Thank you for your feedback! The team is planning for this work. We will share an update as soon as one is available.
For the separate feature ask to disable attendee audio, we are pleased to announce this has been released. For more information, please see this UserVoice item https://microsoftteams.uservoice.com/forums/555103/suggestions/39784519.
An error occurred while saving the commentHenrik Igor Novikov-Wessert commented
Urgent! Students (kids) showing inappropriate content to each other. Let the presenter mute video and mic when "who can present = me only" is set. This is an URGENT missing feature for minor school teachers.