The under-screen camera essentially doesn't matter. For the three times you're in a meeting with it, it'll hold. For everything else, you'll use the primary camera and the front screen.
Lots of people use facetime for personal calls rather than zoom meetings.
Yeah, but I'm not really sure.
There's a perfectly good use case of using this device unfolded with their kickstand powered folio case and a portable keyboard — While getting some zoom calls and productivity / work done.