The recommended session manager for pipewire is called WirePlumber. Not something I would think of it I were to look for it on my own. It didn't even exist a couple months back, and about 6months ago pipewire hardly worked on my laptop.

It's great that OBS works fine for you, but it's really odd that Wayland has been around for over a decade and some things people would consider basic functionality has only recently started working.

I for one hope there is something new coming where the core developers aren't so far detached from reality.

Here's my two cents: What even IS pipewire? I know what the compositor is because I've been given the choice of either X or Wayland in the past so I had to learn what they are. I've heard of pipewire in the past but I have no clue what it is, where does it fit in the display stack, etc.. Same for the linux audio stack.

I don't expect final users to know how to do these though. They want to download OBS and it needs to just work. I'm not sure how hard it would be to implement both in the case of Zoom as to support all setups but I'd assume it's not that trivial, and given other comments above where Wayland seems to have had more than one API for capture you can see where some of these issues come from.

OBS working well on Wayland is AFAICT just in the last year. Pipewire is also just landing in the last 6 months - the most recent Fedora release is the first to use it by default.