As a personal anecdote, recently I installed a co-op videogame on my Linux Steam machine and I couldn't get past the main menu, I wasted quite a bit of my own and my friend's time before realizing it was a bug in the Linux build. After reinstalling the Windows version through Proton everything worked flawlessly.
Please don't publish a Linux build unless you plan to test and maintain it.
As a personal anecdote, recently I installed a co-op videogame on my Linux Steam machine and I couldn't get past the main menu, I wasted quite a bit of my own and my friend's time before realizing it was a bug in the Linux build. After reinstalling the Windows version through Proton everything worked flawlessly.
Please don't publish a Linux build unless you plan to test and maintain it.