One Home Screen

Back when the Apple TV only used a single iCloud account, the 'One Home Screen' option was simple. Now, with multiple users, I'm not sure how it works.

The setting is only available for the Default user. So what about other users. So e.g. if there are 2 Apple TVs, each with the same 2 users, each a Default user on one of the ATVs and with 'One Home Screen' set ON. Now what happens?

Does OHS only function for the Default User? So in the example above, there would be NO screen sync?

Or…

Once each as the Default User has configured their home screen, does the home screen re-arrange to suit whatever user is selected as the Current User?

With several ATVs and several users, do they each have their own Home screen arrangement so whichever ATV they watch, as soon as they select themselves as the Current User, does the home screen re-arrange to suit how that user has configured it on an ATV where they are the Default User?

It should, same as other user specific settings, but does it?