Steam Deck - Fix missing SteamOS boot option, Fix NTFS read-only
If switching release branch doesn't work you can also go to Konsole and type " `sudo efibootmgr -c -L "SteamOS" -l "\EFI\steamos\steamcl.efi" -d /dev/nvme0n1p1 -b0001` (assuming 0001 isn't in use, check `efibootmgr` first)