Steady 60 FPS on the Steam Deck!
The first time you launch the game, it may take about a minute to complete initial runtime caching. During this time, most calculations are pre-processed to ensure smoother gameplay going forward.
Please note that you don't need to enable frame generation to hit the frame rate cap of 60. The frame generation feature is now primarily for conserving battery life when needed.
If login fails on Steam Deck, set Compatibility → Proton Experimental. A mismatch is very common after a plugin Steamworks SDK bump.
Steam Deck compatibility
Source: Steam Community (opens in a new tab)