Maybe look up why the game was rejected from Steam in the first place.

They have:

If you’re trying to make a PC that has similar features and similar performance, I think the Steam Machine is going to be a really competitive price to that and provide really good value to it

https://www.gamespot.com/articles/how-much-will-steam-machine-cost-heres-what-valve-had-to-say-about-pricing/1100-6536161/

No, it’s supported on two specific pieces of custom hardware, the Steam Deck and Steam Machine. They’ll get there with general support, but SteamOS isn’t there yet.