The Steam Deck beta and Preview channels got an update last night with the following highlights:
Fixed visual glitches when dismissing a context menu in main BPM UI while a game is running
Adjusted size/layout of the controller support information section in the configurator
Fixed the "Enable Steam Input" button not being shown on Deck when manually opting controllers out of Steam Input
Default shortcuts into Steam Input in the new PlayStation controller support mode instead of requiring each one to be manually opted in.
Preview Channel Only
Unified the Refresh Rate and Framerate Limit settings in the Performance tab into a single slider. Using a single slider will enable the system to pick options that were previously not exposed, e.g. frame tripling a 20FPS game to display it on a 60Hz screen.
Added a toggle to opt-out of the unified refresh rate slider to Settings->Display->Advanced.
You can follow the steam updates directly here