Utilizing FBDI Payables Payment Request Import

Summary:

Utilizing FBDI Payables Payment Request Import to bulk upload PPRs

Content (required):

We are looking into automating our Payables PPR process. Came across FBDI Payables Payment Request Import (PayablesPaymentRequestImportTemplate.xlsm) which looks very promising. However, when conducted testing, the FBDI template created new suppliers and new invoices.

Our requirement is to bulk create Payment Process Requests for existing invoices. Is the above mentioned FBDI not designed for this purpose?

Also searched REST APIs for Payment Process Requests - there is no 'Create a payment process request' available.

REST API for Payable Payments does have a 'Create a payment' request; but this is only for manual payments.