Hide DFF from Additional Information area PO header REDWOOD

We have a Purchasing Document Header DFF that is only relevant to BPAs. It is mandatory on BPAs. In the Classic PO header screen, we have removed this DFF from the PO header UI as it is not relevant to POs.

I have turned on Redwood Create POs functionality and am trying to create a PO. I am unable to create a PO unless I populate this field as it is marked as mandatory.

In our solution, it is only mandatory for BPAs, not POs. I need to remove this field from the UI as I have in the Classic UI however I cannot see a section in Visual Builder where I can set this field to not visible. There is a no section in the rules builder area where I can update what is displayed for Additional Information (Descriptive Flexfields on the PO header), the sections seem to only cover seeded PO fields.