Kudos for at least trying to address this, MS should hang their head in shame, this is not the hardest problem to solve these days. If we could do it in 1995 they should be able to do it 30 years later.
Office 365 actually works better in Firefox in Linux than any other browser in Windows. It's like they've kind of given up on the whole OS thing, and have just decided to go with Linux.
/usr/bin/chromium --ozone-platform=wayland --enable-features=UseOzonePlatform,WaylandWindowDecorations,WebRTCPipeWireCapturer --user-data-dir=/home/myuser/.config/chromium-ilri --app=https://teams.microsoft.com
Works incredibly well (put this in a `.desktop` file with `Exec=` and you can launch it via your desktop's launcher). Some of the settings may not be needed anymore, as Chromium has come a long way in terms of Wayland support. I use Firefox for everything else, but haven't tried Teams there.