Well, if the buzz I've heard recently (and the article below) are correct. A native Linux "Microsoft Teams" client is coming (pretty sure I heard mid-December)

https://www.windowscentral.com/its-official-microsoft-teams-...

EDIT: Yup, the link referenced by the article (https://microsoftteams.uservoice.com/forums/555103-public/su...) says:

"We’re pleased to confirm the Teams client for Linux will be available in preview by the end of this calendar year, enabling people who use Linux client at work or in educational institutions to collaborate with others on Teams. Users will be able to install native Linux packages in .deb and .rpm formats."

Yeah, teams was pretty badly broken even a few months ago... There's an "unofficial" client in Flathub, that's what I've been using and it mostly works now... the only broken feature I'm aware of that I haven't re-tried is the desktop sharing... but the A/V chat and webcam now work.

It used to work fine in the browser if you spoofed your user agent to Edge. They shut that down somehow. The standalone client still works with a little wrapper (see teams-for-linux).