В стим теперь можно посмотреть комментарии разработчиков по поводу совместимости игры со Steam Deck

Logging into Ubisoft Connect on your Steam Deck. To play Prince of Persia: The Lost Crown on your Steam Deck, you may be asked to log into Ubisoft Connect using your Ubisoft account . On a first-time setup, be sure that your Steam Deck is connected to the internet. To log into Ubisoft Connect On your Steam Deck, launch the game from your Steam Library. Press and hold the "Steam" button, and then the "X" button to open the virtual keyboard. You can close it again the same way.