You can mix and match your external devices (controllers, keyboards, mic, etc.) when you play Fortnite on your mobile device, PC or console. Using any external devices to play is perfectly fine and will not result in any bans on your account.
Note: Mouse and keyboards cannot be used with Android devices.
Note: We aren't able to test all devices so some of them may not be compatible with your mobile device or console. Be sure to contact the manufacturer(s) of your devices to make sure they are compatible. Epic Games Player Support does not offer tech support for any issues you may encounter from using external devices.