Valve has not yet put in the effort to create a generic version of SteamOS because their focus is on the Steam Deck right now, but the community has.
Bazzite has been made to look and feel almost exactly like the Steam Deck and can be installed on any PC (AMD GPU recommended). Give it a shot!
I'm fairly confident that ensuring countries remain sovereign is a net benefit for the world, even if I never step foot in Ukraine. We are lucky to live in this time of relative global peace, and strongmen countries invading others just because they can is something we need to put behind us.