In the coming days, we will be making an update that should enable cloud save syncing between PC and Steam Deck. We are making this announcement ahead of time, so that you are aware when the change becomes effective. You may see a prompt about save file conflicts, so be very careful which version you choose. You may wish to back up your files in advance to be safe.
Your save files are located here:
Win: %appdata%\Roaming\fates_of_ort\
Mac: ~/Library/Application Support/fates_of_ort/
Linux: ~/.config/fates_of_ort/