Successfully installed on SteamDeck
Nearly 60 percent of the steamOS functionalities works. The other 40 are heavily dependency of systemd which requires a huge overall rewrite. The 40 percent are very important such as tpm, framerate, freshrate, deckyloader, and many others to optimize the steamdeck to fullest. Those are not functional atm. I use mixture of Valve's repo (kernel and it's headers, amdcode, firmwares, etc), Artix repo, and aur. I wrote two dinit service. It uses opensd.
It can boot straight into big picture mode with additional 5-10 seconds. Virtual keyboard works as long steam is running in the background. Steam button + X opens virtual keyboard.
Do I recommended it? Yes but a big no. There are some jank involved. Just stick with Valve's OS until community comes together to build knock off version of Valve's OS with fully functional dinit service build in.