The features should also capture and maintain the order in which participants raise their hand so it can form a kind of queue the presenter can work though.

I am using Screen to mentor students and.. it is a game changer. Right now my groups are small but I would greatly value this feature in the future.

Does ephemeral messaging work as a stop-gap for this use case? You can just start typing (no need to click on a button) and it goes across to everyone in the meeting. I know this isn't ideal, but I'm curious to hear your thoughts on this approach.