Just tried the Zoom "app" for the first time. Its useless. Its not actually the Zoom app, but the web browser version of Zoom.
Which means, almost every meeting requires you to be logged in to join (Zoom's default - and they scream at you if you disable this "feature"). That means people with SSO enabled work accounts can't log into the website thus meaning you can't join and Zoom meeting.
Useless. Much like Zoom itself.