PO not autogenerated from PRs with BPA

Summary:

We have three Purchase Requisitions (PRs). Each PR contains one expense service line.
All PRs are linked to the same Blanket Purchase Agreement (BPA).

After the PRs were approved, no Purchase Orders (POs) were generated.

During investigation, we found the following:

• No Buyer was assigned in Configure Procurement Business Function
• No Buyer Assignment Rules were defined
• The Suggested Buyer field was hidden on the PR screen

We then:

• Created a Buyer Assignment Rule
• Ran the Generate Orders process

However, POs are still not generated.

👉 Question:
Is there any way to generate the POs without canceling or resubmitting the approved PRs