a block that can be run that just mutes everyone. changing channel permissions work but only when people leave then rejoin, and there’s no option to just server mute one person or an entire channel.
As far as I can tell, this is not in the Discord API, thus Magic cannot add it. Only features listed on the Discord Developer Portal are possible.
voice channel blocks are not currently planned
This won’t be added because performing actions in bulk like this isn’t officially supported in the API and has to be done by iterating over members and making a bunch of requests, which Discord discourages.
You may want to consider a simpler model that updates roles rather than users, with most members only having a handful of roles and a base role that can easily be ‘locked’.