very niche but i think it deserves a mention: the Outer Wilds mod manager doesn’t just support Linux natively, but it even has a CLI version, and it’s up on AUR and Flatpak
https://outerwildsmods.com/mod-manager/
as others have said though, r2modman/thunderstore manager also runs in an appimage and works perfectly well for games it supports, and MO2 and Vortex work more or less alright if they’re in the same prefix as your game or potentially even if they aren’t.
you’re prescribing an insane amount of competence and forethought to a bunch of infantile psychopaths. I am absolutely certain not once have the thoughts of climate change crossed their minds, and the reason they keep slaughtering people is the same as its always been: profits and/or hatred.