DFFs not functioning as expected in Redwood External Supplier Registration

Summary:

We are in the process of enabling the Redwood Supplier Next Gen Registration for External use cases. The Opt-In has been enabled in Test Instance, however, upon enabling the same, we are facing some issues in the DFFs which were working fine in the Classic UI. 

For DFFs with LOVs as Value Set the security has been enabled and those are working as expected as are the Text based DFFs.

DFFs which have Value Sets deriving values from a Table i.e. Drop-Down List are not showing any value and we cannot enable any security for such value sets. So we need an action plan for the same or is the only option to change the Value Set to a LOV?