It sucked.

Download Edge for Linux and use the PWA. It's still crap but at least it kind of works mostly.

I'm not usually one to defend Microsoft, but since Teams works great in a browser, I actually prefer it that way. My video conference doesn't need access to my whole filesystem and an opacity layer that prevents me from seeing what it does. I actually applaud them for supporting browsers as well as they do.

Yes, except it only worked some of the time on some of the distros (mainly Ubuntu/Debian variants of a certain vintage).