Looks better than the Steam Deck, tbh.
Rog Ally gets windows by default and you have to do some bios stuff to get Linux to install. Including disabling secure boot, etc. I’ve seen some proof of concept installs of Nobara, Ubuntu, HoloISO and ChimeraOS, but last I checked, none of them is particularly stable yet.
Any Linux on rog ally is community supported, not official.