https://wccftech.com/steam-deck-os-3-2-beta/

A new Steam Deck SteamOS beta patch has gone live, introducing some new features to the gaming system by Valve.

The 3.2 Beta update introduces an OS-controller fan curve to improve the experience in low usage scenarios as well as experimental support for changing in-game screen refresh rate that allows users to choose a refresh rate between 40 and 60 Hz.