My 8bitdo ultimate 2c controller is not working, anyone having trouble with this device too? i think it uses xinput and on windows is marked as a xbox 360 controlelr in device manager

I have the 8Bitdo SN30 Pro and Pro 2, both work.
In the newer Models should be a Switch in the Back, check if it is set to Xinput.

Do you have also other Devices connected the PC could recognize as a Controller?
If it thinks your Controller is "Player 2", it will not recognize Input.

I am having the same issue with my 8bitdo ultimate 2c. Did you find the problem?

For me - my controller, Gamesir Cyclone 2, only works while wired. This is the only game I'm aware of that does this. I even tried adding it to steam to use Steam Input but did not work for me.

Try connecting your controller via USB cable and use it wired if it's not working wirelessly for you.