I have written an invocable apex class for process builder to update th owner change of accounts and related Opportunity, contracts and quotes on custom object and its working fine. Now i need to bulkify the code. what are the changes required in below code ?
below code :
public class RequestPortalRecords
{
    @InvocableMethod
    public static void ReqChange(List<Request_Portal__c> rp)
    {
        system.debug('entered raghav' +rp);
        Set<Id> accountIds=new Set<Id>();
        Id ownerid;
        list<Account> updateAccOwnerList = new list<Account>();
        list<Opportunity> updateoppList = new list<Opportunity>();
        list<SBQQ__Quote__c> updateqsList = new list<SBQQ__Quote__c>();
        list<contract> updatecrList=new list<contract>();
        
        
        for(Request_Portal__c r : rp)
        {
            accountIds.add(r.Account_Name__c);
            ownerid=r.New_Owner__c;
            system.debug('accountIds'+accountIds+' ownerid'+ ownerid);
            
        }
        
        //updaTE ACCOUNT
        List<Account> accList=[Select id,ownerid from account where id=:accountIds];
        system.debug('accList'+accList.size());
        
        for(Account acc:accList){
            acc.ownerid=ownerid;
            updateAccOwnerList.add(acc);
        }
        
        system.debug('updateAccOwnerList'+updateAccOwnerList.size());
        if(updateAccOwnerList.size()>0){
            update updateAccOwnerList;
        }
        
        //update opportunities
        List<Opportunity> oppList=[Select id,Ownerid,AccountId from Opportunity Where AccountId = :accountIds ];
        system.debug('opplist'+oppList.size());
        
        
        
        for(Opportunity op: opplist){
            op.ownerid=ownerid;
            updateoppList.add(op);
            
        }
        
        system.debug('updateoppList'+updateoppList);  
        
        if(!updateoppList.isEmpty())
            update updateoppList;  
    
    //update Quote
    List<SBQQ__Quote__c> qsList=[Select id,Ownerid from SBQQ__Quote__c where SBQQ__Account__c = :accountIds];
     for(SBQQ__Quote__c qs: qsList){
            qs.ownerid=ownerid;
           updateqsList.add(qs);
            
      }
        system.debug('updateqsList'+updateqsList);  
        
        if(!updateqsList.isEmpty())
            update updateqsList; 
        
        //contract
        List<Contract> crList=[Select id,Ownerid from Contract where AccountId = :accountIds];
     for(Contract qs: crList){
            qs.ownerid=ownerid;
           updatecrList.add(qs);
            
      }
        system.debug('updatecrList'+updatecrList);  
        
        if(!updatecrList.isEmpty())
            update updatecrList;  
    }    
}