Steam Deck Updates Fix Splitgate, Adds Performance Improvements

Four client updates and one SteamOS update.
DXVK 2.2 Introduces D3D11On12 Support, Improves Compatibility with Game Launchers and Visual Novels

Shortly after the release of D8VK 1.0 comes DXVK 2.2. It’s a pretty hefty update that “introduces support for creating D3D11 devices from a D3D12 device,” improved compatibility with game launchers and certain visual novels that use Microsoft’s WPF toolkit, less redundant logging, along with plenty of bug fixes.
Keep in mind that even though there is improved game launcher compatibility, there is “a noticable performance hit.” Users are encouraged to report the full Proton log when filing bug reports.
ChimeraOS 42 Adds Support for Aya Neo 2, OpenGamepadUI

Plus GPD Win 4 controller support and several bug fixes.
Mesa 23.1 Improves Game Load Times, Reduces Stutter, and Shrinks Shader Cache Size

Along with plenty of other features in this massive update!
GE-Proton8-3 Fixes Video Playback Regression, Applications Going to Windowed Mode

DXVK and VKD3D-Proton have been updated to the latest git.
D8VK 1.0 Adds Many Game-Specific Configurations, Features, and Tweaks

d3d9.dll no longer needs to be installed!
Steam Deck Client Beta Fixes Virtual Menus in Desktop Mode, Adds Find Bar, and Respects Scaling

Bug fixes, some more bug fixes, oh, and some more fixes.
GE-Proton8-2 Fixes Monster Hunter Rise, Shatterline, Conception Plus

Plus: if you’re using the Steam Snap, installation instructions have been provided.
Proton Experimental Adds Compatibility to Gunfire: Reborn, NVAPI Support to Redfall and Returnal

Fixes have also made it in for Battle.NET, EA launcher, and a few games.