Is there any way to restrict not to generate PO automatically for expense PRs only?

Summary:

Do we have any configuration that says auto-create PO for "inventory requisitions but not for expense requisitions" within the same procurement BU?

Business case:-

There's currently a validation when people are searching for supplier item numbers against non-stock orders. If the supplier+site+category matches an Active MRO BPA, the requisition and PO that are generated will automatically process into a PO without needing to be processed by team.
Problem 1. There's no manual processing of the requisition to a PO
Problem 2. there could be multiple suppliers or multiple instances of the same Supplier item number across BPA or incorrect pricing compared to the price on the BPA