How to make SuggestedBuyerField visible in Redwood UI for SSP

Summary:

We are migrating from Classic UI to Redwood UI for Self Service Procurement. While creation of REQ, Buyer field is not visible, so we are using VB Studio to make the 'Suggested Buyer' field visible by following below steps, unfortunately, unable to find Source or suggestedBuyerField, any help on this is greatly appreciated.

Open the edit requisition line page for editing in VB Studio via the settings and Enter the Express Mode and click the 'Configure Fields and Regions' button under Business Rules section. Create a new form rule and then, under 'Regions and Fields' search for the 'Source' region. The 'suggestedBuyerField' can be found under this region - Set this field to 'Visible'.