Want to link all unlinked Purchase Receipts with Purchase Invoice

After 8 months of using ERPNext I came to see that our accountant has created all purchase invoices directly from purchase order. In this case, auditors are not able to navigate to purchase receipts from connections of purchase invoice or vice versa i.e. not able to navigate to purchase receipt from connections of purchase invoice. This lack of connectivity impedes efficient auditing and accurate transaction tracking.

Below are the images of connections of purchase invoice and purchase receipt belonging to same purchase order.

I want to do some sort of reconciliation by which all purchase receipts linked to particular purchase order gets connected to purchase invoice linked to that purchase order. Just like all payment gets linked to purchase invoice through payment reconciliation tool.

Kindly help.