How to enable PO AME for the PO's created automatically from PR or from PO form

Dear All,

As per the document givens below, Shown only creating the PO from buyer work center to trigger AME approval.

R12 Required Setups For Purchase Order Approval Using Approvals Management Engine (AME) (Doc ID 1487713.1)

But our business requirement is PO either will created from PO forms or will auto created from PR. and should be submitted for approval using AME setups.

Please suggest the solution.

Thanks In Advance.