Supplier bank account information

Summary:

I have built a supplier view only custom role, the users with this role cannot be allowed to see the supplier bank details. I need to hide the supplier bank account information from Supplier Profile and supplier site level.

Content (please ensure you mask any confidential information):

I have removed the Privilege "View Supplier Registration Bank Account"  But in testing I can still see the bank account information at site level.

Is there any way we can hide the bank account from Site Level ?

I've seen previously it is partially masked with only the last 4 digits being visible but I do not know how that was achieved