Can I use a Switch Pro Controller in Fortnite Creative on Windows 11?

Yes, x360ce is a great somewhat older wrapper. Xinput is the input driver format for Xbox controllers of all types, Dinput is an older standard and is used for most generic controllers. Wrappers basically emulate Xinput for Dinput devices.

I couldn’t find a resource with a step by step tutorial, but the idea is roughly the same. Download the correct architecture version in this case 64 bit. Place the software in the same folder as the exe file that will be running, target it inside of x360ce. Then launch the engine and give it a try.

This thread goes over it a bit: