how to connect a dropship customer invoice to the AP invoice?

One AR Invoice Number with 5 Invoice lines for the same Sales Order and same Sales Order line which is split fulfilled by Supplier which has 1 Dropship PO and 1 PO Line. The Order was fulfilled by Supplier in multiple installments which created multiple PO Receipt Number. How to create a 1:1 link between AR Invoice and PO Receipt and fetch the PO receipt date