It's listed as Steam Deck compatible on the store page, and it's rated Platinum on ProtonDB[0], so it definitely runs fine on Linux through Proton.

[0]: https://www.protondb.com/app/2060160

It does work well with Crossover (paid app) on my M2. (Just submitted it to the DB and waiting for acceptance).

Someone in the Steam forum said it may also work with Whisky, but there seems to be issues with saved games that way?

I'm also trying to get the dev to add it to GeForce Now.

But yeah, a native Mac/Linux client would be great.