How to group requisition to single PO for B2B buy

Summary:

In B2B Buy we need to group all the lines requisition into single PO against all the lines of a sales order

Content (please ensure you mask any confidential information):

We have a business requirement to group the requisitions for a B2B sales order with multiple lines into a single Purchase Order.

We have disabled the option to auto create PO from BPA from Procurement Business Function.

Also in BPA controls we have enabled group based on sales order number under group requisition.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):