Oracle Cloud Receivables Credit Memo Refund Approvals not available

Hello Everyone! We are trying to see is there any customization we can do to setup approvals for Credit Memos Refund in Receivables. We have approval limits which will only give access to users to create the Credit Memo Refund within the limits. We were trying to extend the approval so that it routes to the specific user in the organization for approval, so that we can have control on refunds.

Note: AP invoice which gets created for Receivables Refund, the invoice type is Payment Request doesn't applicable for approvals.

Appreciate your help on the above.

Regards, Khaleel