How do we give supplier access to see only their items in the Supplier Portal?

Summary:

How to limit Supplier Access to Items in the Portal to the ones in PIM associated to their trading partner

Content (please ensure you mask any confidential information):

I see that you can use Supplier Product Design Engineer and Supplier Product Administrator to view items, but it seems to give access to all items. Is there a simple way to limit the items a supplier can view to only ones they are listed as a trading partner for?

Version (include the version you are using, if applicable):

24D

Code Snippet (add any code snippets that support your topic, if applicable):