Bid__c Object record values does not getting updated when I exectute this trigger. But I didn't receive any error in this trigger. The Bid__c object values alone not getting updated

trigger UpdateRFQBid on RFQ__c (after update)
{
  List<Bid__c> lstBid = new List<Bid__c>();
   for(RFQ__c r : Trigger.new)
  {
   if(r.Mode_s__c != null)
    {
      // split out the multi-select picklist using the semicolon delimiter
     for(String modes: r.Mode_s__c.split(';'))
    {
        if (modes == 'Private Fleet' && r.Bid_Private_Fleet__c == true)
        {
          // Check for EXISTING Record:
          Bid__c[] Old_Bid =
          [ SELECT Id FROM Bid__c WHERE Modes__c='Private Fleet' AND RFQ__c=:r.id];
          System.debug('Old_Bid.Size()=' + Old_Bid.Size());
          if(Old_Bid.Size()==0) // If NONE then Add
          {
             {
                Bid__c b               = new Bid__c();
                b.RFQ__C               = r.id;
                b.RecordTypeId         = '012Z00000004XEsIAM';
                b.Modes__c             = 'Private Fleet';
                b.Apex_trigger__c      = true;
                lstBid.add(b);
             }
          }     
         }
       
       {
        if (modes == 'Dry Van')
        {
         // Check for EXISTING Record:
          Bid__c[] Old_Bid =
          [ SELECT Id FROM Bid__c WHERE Modes__c='Dry Van' AND RFQ__c=:r.id];
          System.debug('Old_Bid.Size()=' + Old_Bid.Size());
          if(Old_Bid.Size()==0) // If NONE then Add
         {
            Bid__c b               = new Bid__c();
            b.RFQ__C               = r.id;
            b.RecordTypeId         = '012Z00000004XExIAM';
            b.Modes__c             = 'Dry Van';
            b.Apex_trigger__c      = true;
            lstBid.add(b);
          }
        }
       }
       
       {
          if (modes == 'Flatbed')
        {
          // Check for EXISTING Record:
           system.debug('&&&&&&');
          Bid__c[] Old_Bid =
          [ SELECT Id FROM Bid__c WHERE Modes__c='Flatbed' AND RFQ__c=:r.id];
          System.debug('Old_Bid.Size()=' + Old_Bid.Size());
          if(Old_Bid.Size()==0) // If NONE then Add
          {
            Bid__c b               = new Bid__c();
            b.RFQ__C               = r.id;
            b.RecordTypeId         = '012Z00000004XFqIAM';
            b.Modes__c             = 'Flatbed';
            b.Apex_trigger__c      = true;
            lstBid.add(b);
          }
          }
       }
       
       {
          if (modes == 'IMDL')
        {
          // Check for EXISTING Record:
          Bid__c[] Old_Bid =
          [ SELECT Id FROM Bid__c WHERE Modes__c='IMDL' AND RFQ__c=:r.id];
          System.debug('Old_Bid.Size()=' + Old_Bid.Size());
          if(Old_Bid.Size()==0) // If NONE then Add
          {
            Bid__c b               = new Bid__c();
            b.RFQ__C               = r.id;
            b.RecordTypeId         = '012Z00000004XG5IAM';
            b.Modes__c             = 'IMDL';
            b.Apex_trigger__c      = true;
            lstBid.add(b);
          }
          }
       }
       
       {
         if (modes == 'LTL')
        {
          // Check for EXISTING Record:
          Bid__c[] Old_Bid =
          [ SELECT Id FROM Bid__c WHERE Modes__c='LTL' AND RFQ__c=:r.id];
          System.debug('Old_Bid.Size()=' + Old_Bid.Size());
          if(Old_Bid.Size()==0) // If NONE then Add
          {
            Bid__c b               = new Bid__c();
            b.RFQ__C               = r.id;
            b.RecordTypeId         = '012Z00000004XG0IAM';
            b.Modes__c             = 'LTL';
            b.Apex_trigger__c      = true;
            lstBid.add(b);
          }
        }
        }
        
       {
         if (modes == 'Reefer')
        {
          // Check for EXISTING Record:
          Bid__c[] Old_Bid =
          [ SELECT Id FROM Bid__c WHERE Modes__c='Reefer' AND RFQ__c=:r.id];
          System.debug('Old_Bid.Size()=' + Old_Bid.Size());
          if(Old_Bid.Size()==0) // If NONE then Add
          {
            Bid__c b               = new Bid__c();
            b.RFQ__C               = r.id;
            b.RecordTypeId         = '012Z00000004XFlIAM';
            b.Modes__c             = 'Reefer';
            b.Apex_trigger__c      = true;
            lstBid.add(b);
          }
        }
        }
       
      {
         if (modes == 'RFI')
        {
          // Check for EXISTING Record:
          Bid__c[] Old_Bid =
          [ SELECT Id FROM Bid__c WHERE Modes__c='RFI' AND RFQ__c=:r.id];
          System.debug('Old_Bid.Size()=' + Old_Bid.Size());
          if(Old_Bid.Size()==0) // If NONE then Add
          {
            Bid__c b               = new Bid__c();
            b.RFQ__C               = r.id;
            b.RecordTypeId         = '012Z00000004XFvIAM';
            b.Modes__c             = 'RFI';
            b.Apex_trigger__c      = true;
            lstBid.add(b);
          }
        }
      }
     }
   }
    }
   upsert lstBid;
 }