I've been running Steamfork on it for a long time and it's been amazing. Highly recommend it as it's a very minimal fork that is basically just SteamOS + device support.
On what hardware are you running it?
On the original ROG Ally. Although I did upgrade some parts of it (bigger SSD for example).
The updated version of the Ally replaces the proprietary port with a 2nd USB-C/Thunderbolt port. It also has a black chassis.
I would do this (Windows 11 is terrible), but using Linux breaks EA games including my beloved BF1 and also Destiny