How to create ERS invoice after the PO shipment status is "Closed for Receiving"

Hello Experts,

I have a scenario, can anyone advise if this is possible.    

For few suppliers, the authorized person have not enabled with Pay On "Receipt" at supplier site level while creation rather its NULL. Also, the receiving area admin has created the receipt for 10+ PO's and hence the PO shipment status changed to "Closed for Receiving" without generating ERS invoice for 10+ PO. But now the Invoice user is expecting the ERS invoice after enabling the site with Pay On"Receipt" at this moment.

Note: Client side user has to enable this option but forgot to do it which causes this issue.