I've told several external contacts if they cannot reschedule on something other than Zoom. They usually oblige with Teams. Which, has worked OK on Firefox and Linux so far.
As a Firefox enjoyer it really feels bad to keep Brave around just to use Teams. Not that I have any problem with Brave just, if a billion dollar company can't be bothered to make a native Linux app that's fine (it's not) but could they at least support the major browsers?