This simple bot will automatically make child channels, based on the parent channel it is keeping track of. It will always leave 1 empty channel, for players to join. To set up the bot, use "/admin voice-channels add" to add a parent channel.
There is also a public instance of this bot available with the following invite url: https://discord.com/oauth2/authorize?client_id=1508897603302064289&permissions=277293950992&scope=bot%20applications.commands
If you need further assistance with the bot. You can ask it here: https://discord.gg/bf6ranked