Steam Deck Client Beta got a Jan 23 Update. This Update brings some changes to Steam input and to the Steam Deck Desktop mode.
Reworked the layout of the mode settings page to show more content
Added upper grips as an option for mode shifts.
Filtered Mode Shift button options to only show available buttons based on the controller type.
Fixed chord activator options for XBox and XBox Elite controller types.
Improved Layout Preview for Nintendo Switch Joycon Left/Right/Pair.
Fixed Capture button icon not being displayed for Joycon Pair.
Fixed the Switch Pro Layout Preview not showing the gyro.
Nintendo Switch SL/SR buttons now show up as Bumpers for single Joycons or Grip buttons for a JoyCon Pair.
Joycon individual/pair Gyro now displays and functions properly.
Hide the cursor when in gamepad-navigation mode in Big Picture
Fixed Big Picture Mode keyboard window not exiting when closed.
You can find the change log here