If it helps anything, you can install Lutris from Flathub* and then add the .exe of this game to Lutris. You should be able to select a Wine version from there as well. If you want/need Proton versions, install ProtonUp from Flathub*; run ProtonUp, install a Proton version for Lutris, and THEN open Lutris and change the game's settings to use that Proton version. But yeah, it's still nice to have the recognition with a native Linux version 😞
* = On Steam Deck you need to go to the desktop mode first. From there you have KDE, like with any other Linux with KDE, you can run Discover which is its app store and install Lutris and/or ProtonUp from there.
I hope this helps, if not LMK and let's figure it out together!