Visible "on hold" indication on meeting attendees
Show some "On Hold" indicator or icon on people e.g. on their avatars and in the people list panel. This is just to understand if a person is actively participating in a meeting or currently on hold (and thus just can't answer questions being discussed in a group).
Kelley Meaker commented
Working from home, I switch between my all-day team meeting and various other meetings throughout the day. I'd like an indicator (like the "raised hand" indicator) to show that while I'm still logged in to the all-day meeting, I'm not actually "there" because I'm in another meeting.