How to assign group of buyers to a single Purchase Requisition using Buyer Assignment Rules

Summary: Hello Oracle experts, the client wants to assign a approved Purchase requisition to a group of buyers for converting it to a Purchase Order. Is there any option available technically to achieve this? We tried with Buyer assignment rules which didn't help as it works based on the rule sequence and it is allowed to assign only one Buyer for PO processing for a Purchase requisition.

Also client wants to have the control of PRs coming from particular Deliver to Org should go to particular team and hence we cannot keep the Process requisition open without Buyer assignment rule segregation.