You can try one thing.

Can create a trigger on po_headers_all, authorization_status, and when this is approved, call a custom code to insert records into receiving interface tables and call "Receiving tarnsaction processor" through code.

Then no manual intervention will be required for Receipt creation.

Check these for sample scripts

Receiving Open Interface (ROI): Features and Links to Useful ROI Documents (Doc ID 559956.1)

Compilation of Notes With Sample Scripts for Various Receiving Open Interface (ROI) Transactions (Doc ID 1115743.1)

Regards,

Sirisha