cross-company billing MM invoice

I have one cross company billing invoice 902300, billing type Z01, IDOC is generated, message type: INVOIC, message variant:01, this is outbound IDOC, but I think AP invoice should be generated, where can I find AP invoice, in the document flow of 902300, I can't find any payable invoice, only RV document

if this is not the correct forum , may I know which forum I should post