Hi Team , 
Can anyone help this simple one. I tried but couldnt succeed. 
I have a quick action button Named "Customer" placed on Account record.
1. On click of customer i want the Account name to be displayed on  the look up. but i am getting id as shown in screenshot . (Need some code fix )

i have highlighted the code in lookup cmp JS , were i am passing in the record id. may i know how to get the account name 

Customer.html
<template>
    <lightning-card>
      <header class="slds-modal__header" data-aura-rendered-by="142:2755;a">
        <h2 class="slds-modal__title" data-aura-rendered-by="143:2755;a"><b>Customer</b></h2>
        </header>
        <div class="slds-m-around--xx-large ">
  
    <div class="form-group">
         <c-custom-Lookup-Lwc>icon-name="standard:account"
            s-object-api-name="Account"
            label="Account Name "
            onlookupupdate={lookupRecord}
            placeholder="Search Account here..."></c-custom-Lookup-Lwc>
    </div>    
    
   
        
      <footer class="slds-modal__footer" data-aura-rendered-by="145:2889;a">
        <div>
          <lightning-button variant="neutral" label="Cancel" onclick={closeAction} ></lightning-button>
          <lightning-button variant="brand" label="Save" onclick={closeAction} ></lightning-button>
        </div>
      </footer>
    
      </div>
    </lightning-card>
  </template>
  
  ===========
  import { LightningElement,wire,api,track} from 'lwc';
import { CloseActionScreenEvent } from 'lightning/actions';

export default class Customer extends LightningElement {
    lookupRecord(event){
        alert('Selected Record Value on Parent Component is ' +  JSON.stringify(event.detail.selectedRecord));
    }

    closeAction(){
        this.dispatchEvent(new CloseActionScreenEvent());
    }

}
===================================
lookup component or child component:

<template>
    <div class="slds-form-element" onmouseleave={toggleResult}  data-source="lookupContainer">      
        <div class="slds-combobox_container slds-has-selection">
          <label class="slds-form-element__label" for="combobox-id-1">{label}</label>
          <div class="lookupInputContainer slds-combobox slds-dropdown-trigger slds-dropdown-trigger_click" aria-expanded="false" aria-haspopup="listbox" role="combobox"> 
           <div class="slds-combobox__form-element slds-input-has-icon slds-input-has-icon_left-right" role="none">
              <div class="searchBoxWrapper slds-show">
                <!--Lookup Input Field-->
                <lightning-input                   
                   type="search"
                   data-source="searchInputField"
                   onclick={toggleResult}
                   onchange={handleKeyChange}
                   is-loading={isSearchLoading}
                   value={searchKey}
                   variant="label-hidden"
                   placeholder={placeholder}
               ></lightning-input>  
              </div>
              
            <!--Lookup Selected record pill container start-->  
            <div class="pillDiv slds-hide">        
              <span class="slds-icon_container slds-combobox__input-entity-icon">
                <lightning-icon icon-name={iconName} size="x-small" alternative-text="icon"></lightning-icon>  
              </span>
              <input type="text"
                     id="combobox-id-1"
                     value={selectedRecord.Name}       
                     class="slds-input slds-combobox__input slds-combobox__input-value"
                     readonly
                     />
              <button class="slds-button slds-button_icon slds-input__icon slds-input__icon_right" title="Remove selected option">
              <lightning-icon icon-name="utility:close" size="x-small" alternative-text="close icon" onclick={handleRemove}></lightning-icon> 
             </button>
            </div>  
            </div>
        
            <!-- lookup search result part start-->
            <div style="margin-top:0px" id="listbox-id-5" class="slds-dropdown slds-dropdown_length-with-icon-7 slds-dropdown_fluid" role="listbox">
              <ul class="slds-listbox slds-listbox_vertical" role="presentation">
                <template for:each={lstResult} for:item="obj">
                <li key={obj.Id} role="presentation" class="slds-listbox__item">
                  <div data-recid={obj.Id} onclick={handelSelectedRecord} class="slds-media slds-listbox__option slds-listbox__option_entity slds-listbox__option_has-meta" role="option">
                    <span style="pointer-events: none;" class="slds-media__figure slds-listbox__option-icon" >
                      <span class="slds-icon_container" >
                          <lightning-icon icon-name={iconName} size="small" alternative-text="icon" ></lightning-icon>  
                      </span>
                    </span>
                    <span style="pointer-events: none;" class="slds-media__body" >
                      <span  class="slds-listbox__option-text slds-listbox__option-text_entity">{obj.Name}</span>
                    </span>
                  </div>
                </li>
                </template>
                <!--ERROR msg, if there is no records..-->
                <template if:false={hasRecords}>
                  <li class="slds-listbox__item" style="text-align: center; font-weight: bold;">No Records Found....</li>
                </template>
              </ul>
             
            </div>
          </div>
        </div>
      </div>
  </template>

=============
/* https://lwcfactory.com/custom-lookup-salesforce-lwc/
API : 50
Source : lwcFactory.com
*/
import { LightningElement,api,wire} from 'lwc';
// import apex method from salesforce module 
import fetchLookupData from '@salesforce/apex/CustomLookupLwcController.fetchLookupData';
import fetchDefaultRecord from '@salesforce/apex/CustomLookupLwcController.fetchDefaultRecord';
import { CurrentPageReference } from 'lightning/navigation';

const DELAY = 300; // dealy apex callout timing in miliseconds  

export default class CustomLookupLwc extends LightningElement {
    // public properties with initial default values 
    @api label = 'custom lookup label';
    @api placeholder = 'search...Acc...'; 
    @api iconName = 'standard:account';
    @api sObjectApiName = 'Account';
    @api defaultRecordId = '';
    @api recordId;
    
    // private properties 
    lstResult = []; // to store list of returned records   
    hasRecords = true; 
  //  searchKey=''; // to store input field value   
     searchKey=''; 
    isSearchLoading = false; // to control loading spinner  
    delayTimeout;
    selectedRecord = {}; // to store selected lookup record in object formate 

    @wire(CurrentPageReference)
    getStateParameters(currentPageReference) {
        if (currentPageReference) {
            this.recordId = currentPageReference.state.recordId;
            console.log('this.recordId==35==='+this.recordId);
            this.searchKey= this.recordId;
        }
    }

    // initial function to populate default selected lookup record if defaultRecordId provided  
    connectedCallback(){
     console.log('this.defaultRecordId====='+this.defaultRecordId);
     console.log('this.recordId==CCB==='+this.recordId);
     
      if(this.defaultRecordId != ''){
            fetchDefaultRecord({ recordId: this.defaultRecordId , 'sObjectApiName' : this.sObjectApiName })
            .then((result) => {
                if(result != null){
                    this.selectedRecord = result;
                    this.handelSelectRecordHelper(); // helper function to show/hide lookup result container on UI
                }
            })
            .catch((error) => {
                this.error = error;
                this.selectedRecord = {};
            });
         }
    }

    // wire function property to fetch search record based on user input
    @wire(fetchLookupData, { searchKey: '$searchKey' , sObjectApiName : '$sObjectApiName' })
     searchResult(value) {
        const { data, error } = value; // destructure the provisioned value
        this.isSearchLoading = false;
        if (data) {
             this.hasRecords = data.length == 0 ? false : true; 
             this.lstResult = JSON.parse(JSON.stringify(data)); 
         }
        else if (error) {
            console.log('(error---> ' + JSON.stringify(error));
         }
    };
       
  // update searchKey property on input field change  
    handleKeyChange(event) {
        // Debouncing this method: Do not update the reactive property as long as this function is
        // being called within a delay of DELAY. This is to avoid a very large number of Apex method calls.
        this.isSearchLoading = true;
        window.clearTimeout(this.delayTimeout);
        const searchKey = event.target.value;
        this.delayTimeout = setTimeout(() => {
        this.searchKey = searchKey;
        }, DELAY);
    }


    // method to toggle lookup result section on UI 
    toggleResult(event){
        const lookupInputContainer = this.template.querySelector('.lookupInputContainer');
        const clsList = lookupInputContainer.classList;
        const whichEvent = event.target.getAttribute('data-source');
        switch(whichEvent) {
            case 'searchInputField':
                clsList.add('slds-is-open');
               break;
            case 'lookupContainer':
                clsList.remove('slds-is-open');    
            break;                    
           }
    }

   // method to clear selected lookup record  
   handleRemove(){
    this.searchKey = '';    
    this.selectedRecord = {};
    this.lookupUpdatehandler(undefined); // update value on parent component as well from helper function 
    
    // remove selected pill and display input field again 
    const searchBoxWrapper = this.template.querySelector('.searchBoxWrapper');
     searchBoxWrapper.classList.remove('slds-hide');
     searchBoxWrapper.classList.add('slds-show');

     const pillDiv = this.template.querySelector('.pillDiv');
     pillDiv.classList.remove('slds-show');
     pillDiv.classList.add('slds-hide');
  }

  // method to update selected record from search result 
handelSelectedRecord(event){   
     var objId = event.target.getAttribute('data-recid'); // get selected record Id 
     this.selectedRecord = this.lstResult.find(data => data.Id === objId); // find selected record from list 
     this.lookupUpdatehandler(this.selectedRecord); // update value on parent component as well from helper function 
     this.handelSelectRecordHelper(); // helper function to show/hide lookup result container on UI
}

/*COMMON HELPER METHOD STARTED*/

handelSelectRecordHelper(){
    this.template.querySelector('.lookupInputContainer').classList.remove('slds-is-open');

     const searchBoxWrapper = this.template.querySelector('.searchBoxWrapper');
     searchBoxWrapper.classList.remove('slds-show');
     searchBoxWrapper.classList.add('slds-hide');

     const pillDiv = this.template.querySelector('.pillDiv');
     pillDiv.classList.remove('slds-hide');
     pillDiv.classList.add('slds-show');     
}

// send selected lookup record to parent component using custom event
lookupUpdatehandler(value){    
    const oEvent = new CustomEvent('lookupupdate',
    {
        'detail': {selectedRecord: value}
    }
);
this.dispatchEvent(oEvent);
}


}