A Moderator can lock webcams once the session is running. But I would bet that what you are looking for is to disable them by default before starting the session.
The only way to do it now for Moodle is at the server level https://docs.bigbluebutton.org/dev/api.html#configuration
But if you want to do it per session, that will be possible at some point from the plugin as well. It is in the road map, but not defined yet when it is going to happen.
The only way to do it now for Moodle is at the server level https://docs.bigbluebutton.org/dev/api.html#configuration
But if you want to do it per session, that will be possible at some point from the plugin as well. It is in the road map, but not defined yet when it is going to happen.