For those who ask for the return for Braking Point, I believe the rumour was that it would be a bi-yearly thing. Think of that short story mode in F1 2019, then Braking Point in F1 2021, and perhaps in F1 23 Braking Point 2.0: Electric Boogaloo (sorry, I can't resist it with anything that is 2.0).
I've only driven the Supercars once, and while they're nice to have, I would've preferred the classic cars but I can go to F1 2020 for that. The Supercars could be expanded further, but I'm afraid FOM would not be happy about it.
What I'd ask for F1 23 (apart from major bugfixes) is more DLC tracks. I like Portimao, but only Portimao and China doesn't cut it. I'd like to see Hockenheim return as DLC, as well as Malaysia and perhaps Istanbul Park. And maybe even a 1990s track like Buenos Aires or Okayama (the Pacific GP, alternatively even Fuji).