It sounds like a role/visibility issue rather than a technical failure. Since Customers can see the feeds but Admins can’t, check:
Profile visibility settings – admins may be hidden from feeds/members due to profile restrictions.
Caching – clear site/cache and test in incognito.
Role capabilities – confirm Admin role still has access to view activity feeds (sometimes custom profile/visibility rules override default privileges).
Conflicts – temporarily switch the Admin profile to a standard role and test.