hi I have a flow which convert lead (basically for screen with details of lead) for salesforce1 app.
this is working fine for desktop version but  for SF1 app it is not working, I am getting an opportunity Id after conversion.

VWFConvertLead is the pluging I am using in the flow .
things I have done:

• Implemeted the flow using the plugin. 

  <apex:page standardController="lead" showQuickActionVfHeader="false" extensions="FlowLEadConvertExtension" lightningStylesheets="true">
      <script  type="text/javascript">
      function getopp(){
          var opIdgenerated ="{!opid}";
          console.log('opIdgenerated'+opIdgenerated);
          if( (typeof sforce != 'undefined') && sforce && (!!sforce.one) ) {
               // Salesforce app navigation
               sforce.one.navigateToSObject(opIdgenerated);
               }
          else
              {
                  console.log('in else');
              }
              
          }
      </script>
      
      <apex:slds />
      <flow:interview name="SAMPLE_Lead_Convert_Flow" interview="{!myAutoFlow}"  buttonLocation="bottom" finishLocation="{!nextpage}">
                  <apex:param name="recordId" value="{!Lead.Id}"/>
         
              </flow:interview>
  </apex:page>

  
   
• embedded the flow in the visualforce.
• called the visualforce page from an actin
• used pagerefernce to go to the created opportunity.

  public class FlowLEadConvertExtension {
  
      Public Flow.Interview.SAMPLE_Lead_Convert_Flow myAutoFlow { get; set; }
      Public FlowLEadConvertExtension(ApexPages.standardController controller) {}
     public static string opid{get;set;}
      Public String getmyID() {
          if (myAutoFlow==null)
              return '';
          Else
              opid=myAutoFlow.vaOpportunityId;
              return myAutoFlow.vaOpportunityId;
          }
    
      Public PageReference getNextPage(){     
      PageReference p = new PageReference('/' + getmyID() );
      p.setRedirect(true);
      return p;
      }
  }