Anyone playing on Steam Deck?

I had to switch to the Steam exe (Linux) in order to run it.
Now it does run but progress won't save, every time I open it it would show empty slots.

Having lost a few hours of game last night due to the exact same problem, I did some digging.

If you, via Heroic Launcher, install the windows version, and run it in Proton 7, saving works. I simply havent been able to find any save files at all created with the linux verison.