On Windows 10 Enterprise 20H2 (domain joined) we do not see users in "Edit local users and groups. Instead of seeing a list of users, we see "There are no items to show in this view"
We can add a user, still doesn't show up, but when we go to Groups, we can add the user to a group. and see existing users. The groups show up just fine.
If we type in to a command prompt... Net user TestUser we see the normal output (name, dates, group membership etc).
This is happening on about five computers we have found so far, others work fine.