The team continues to make progress on this. We will share more details as we have them.
We are currently testing the ‘hard audio mute’ feature internally. We will share an update as soon as one is available.
To view this item on the roadmap, please visit https://www.microsoft.com/microsoft-365/roadmap?filters=Microsoft%20Teams&searchterms=66575.
For the separate feature ask to disable attendee video, please track and/or upvote this suggestions: https://microsoftteams.uservoice.com/forums/555103/suggestions/40255927.