New Google Meet Host Controls
Google Meet has launched some new host controls. You can now change the settings on your meet so that participants cannot turn on their microphone or their video. Once these settings are turned off, your participants will not be able to un-mute themselves or turn on their camera.
NOTE: This setting applies to ALL Meet participants. At this time, you cannot turn off this setting for individual participants.
To access this setting, click on the host control icon. 
You will see the new settings under "Let Everyone"
