I could not get Switch Joycons or Nintendo Switch Pro Controller to pair today, in desktop or gaming mode, even after reboot. New Dualshock controllers did pair successfully.
I would assume so as it works perfectly fine backing up and restoring SteamOS i would use clonezilla live Ubuntu variant not the plain Debian one.. clonezilla use a method to determine the best way to 1:1 backup the source disk.. not super familiar on the method i guess ask clonezilla devs if you are that interested.. but nonetheless it should work. I believe theres a way to do a "dry run" to see if everything works like it should without affecting anything but idk how to myself.