Pretty sure any screen sharing from a browser app would use the browsers screen capture api, which should just use your desktops screen sharing portal if on Wayland. Maybe make sure you have the desktop portal for your DE installed.
>>quasig+(OP)
That's not the issue. If other apps can screenshare but teams can't that's a teams problem not a DE problem.
Also switching user agent to chrome fixes the issue (but creates a different issue where you can't join calls sometimes)