I don’t expect an extension that requires a controller to pass review.
See policy 4.8
Installed drivers for a controller could be inferred as downloading third-party software in order to function.
For people on console, this will count as keyboard shortcut as the only interface device is the controller. So they have no way to acces the Twitch App itself.
Similar issue on mobile, where generally someone isn’t gonna have a controller handy to pair and use.
TLDR: I don’t think this would pass review, as you require the viewer/user to have something that not everyone will have