Sure, but please after a general solution. I don't want to be forced to use Steam to mod my games. Many of my games aren't even on Steam!
Also I want it optional, so can control if Steam gets to see my Playtime.
I very much welcome the Nexusmods solution in comparision
It does include it. The article list it in detail: 36.79% of the Linux users use the steam deck. And the number is falling, which means there are more users also using Linux on desktop PC (or other gaming handhelds)
But that may also just be statistical noise.