Just a public PSA and was a little sad. I thought the latest kernel updates would address this. Until then, when you plug the official Xbox Wireless USB in- nothing happens.
The 360 Wireless USB adapter still works tho for some reason. 10+ years and its still kicking.
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