I need to search through one MongoDB collection

  let Firm= await Firm.find({"email":"[email protected]"});

and then, based on the results, which is a array, I need to filter through another collection.
I need to get all objects from another collection, based on all objects that are in the array which I just received.

The only way how to achieve this which I was able to do it is a for cycle:

let Invoices=[];
       
       for (let i=0; i<Firms.length;i++){
           
     let  Results= await  Invoice.find({ "firm_id":Firms[i].firm_id});
      Invoices=Invoices.concat(Results);
       }

But thats pretty ineffective. Can you think of a quicker way?