Last time I checked the current builds run on Windows, Steam Deck (Linux) and MacOS, which is why there's no such thing as specific MAC/linux builds
I'm not really sure if I follow. I ran the game on Windows, Steam Deck and a macbook and each worked very well.
An emulator was not involved, I used the same build each time and just ran the .exe. If you're asking for the Target Platform though, it is set to Windows in Unity.
Does that answer your question?