It seems like Teams modeled this from Slack, Discord, etc., that have completely different selves per thing you join (arguably a very good idea for keeping selv

It seems like Teams modeled this from Slack, Discord, etc., that have completely different selves per thing you join (arguably a very good idea for keeping selves separate), but the UI assumes you change your persona less often. In Teams, click your face top right to change profiles (accounts), like you would in Edge. It's basically the concept of personas or profiles from Firefox or Chrome, but in Teams. Note that you shouldn't have to change personas unless you want to. Guests can be invited, and join as their original persona instead of having to have an inside the tent account.