Allow Site Filtering Policy allow lists (and block lists) to override the global enforcement of Universal List block/allow lists.
You could add a a per-policy toggle: “Allow policy to override Universal Lists”
Use case:
We manage multiple client sites with a consolidated global blocklist applied via Universal Lists. For certain clients/sites, we need to permit specific domains that are blocked globally, without weakening the global list for everyone.
Our currently non-ideal workaround is:
  1. Remove the domain from the Universal List.
  2. Add the domain manually to every other site’s block list, because each site uses a custom filtering policy.