There’s no need to port the game. Just make sure that the Windows version is compatible with Wine/Proton.
EDIT: Nvm — at the end of the article, it states that it’s probable that part of the reason why the Linux version was cancelled was because proton already works well.
On the Linux side, it’s also not overly surprising given that we have Proton now which enables the game to run with a tick of box on Steam. I even showed it previously running really nicely on Steam Deck with Proton using the demo.