Business Classification Fragment Extension for VB Supplier Registration

Hi,

We have an issue with the Visual Builder page for Supplier Registration. We need to do some extensions on the Business Classification Fragment of this page, but the fragment appears in Visual Builder as an empty region, and there is no rules to extend for this fragment under its parent Page "register-supplier-start". Although the other same fragments in the same page have rules that can be extended/overridden in this page. The Business Classification fragment has no rules at all to be extended in this page.

We need to extend the Business Classification fragment fields and rules, any body have an idea about that?