Choose the category where temporary channels will be created.
Where do I find this?
Open the Dashboard -> Select your Discord server -> Select the correct Creator Channel -> Click on the Overview tab -> Temporary Channel Category
Fallback Categories
A Discord category is limited to 50 channels. If your Discord server needs more temporary channels, you have to set up some fallback categories.
Click the + button.
Select all categories you want to use in case another category is full. Make sure these categories have no permissions set to avoid any permission issues.