I know I can install it using Pacman but for that I need to create a root password and then run some command to install programs on the OS which is immutable, but honestly if all I want is to install KDE Connect I see unnecessary to do all that, isn’t there a simpler way?
I already tried with flatpak but there is no KDE-Connect repository in flatpak, and following this Reddit tutorial doesn’t really lead to anything since the repository seems to be dead.
Edit: KDE Connect came pre-installed in the Deck.
KDE Connect is already installed on the deck and running by default. Click the little upward carat next to the time in desktop mode.
Its okay I also learned
I don’t even remember installing it. Are you sure it’s not part of SteamOS/KDE Plasma?
Did you check the Discover store?
Also, Steam Link is another easy option for remote control.
Edit: https://www.gamesinhand.com/post/use-your-phone-to-control-your-steam-deck