afaik xone (the kernel driver for the Xbox One dongle) still isn't part of the linux kernel (neither mainline or steam deck kernel)
the gamepad itself works fine though, only the adapter dongle sucks
since you can also connect the newer Xbox gamepads via bluetooth, it seems like not many people actually care about it
xow isn't supported anymore and already gives problems with newer libusb versions
but xone (the sucessor of xow) will no longer work after a SteamOS update due to the immutable filesystem of the Steam Deck, you would need to set it up after every update again