BPA Approval Rule for Item Attributes (Manufacturer / Manufacturer Part Number) in Oracle Fusion

Hi,

I’m trying to create a Purchasing Document Approval rule in Oracle Fusion for a Blanket Purchase Agreement line.

Requirement:
Automatically reject the BPA if either Manufacturer or Manufacturer Part Number under Item Attributes is blank.

What I checked:

• The rule engine works
• The fields are visible and populated on the BPA line under Item Attributes
• But I can’t find these fields by name in the approval rule attributes
• Using generic line attributes like Attribute 1, Attribute 2, etc. does not match the values from Item Attributes

Question:
Are Manufacturer and Manufacturer Part Number from Item Attributes available in Purchasing Document Approvals