Only with Unreal Engine games, it seems. That includes Direct X 12 implementations in Unreal Engine 4 games:

• The Ascent runs at 2 fps on the main menu, where it basically just renders one dude standing on a roof with a completely red background. It’ll also freeze.
• Outer Worlds Spacer’s Choice Edition also runs at 2 - 5 fps in menus, has low framerate in-game, and crashes every 5 to 10 minutes.
• I have Conan Exiles. Not DX12, but still UE4. Should probably give that a try and see how it goes…
• Oblivion Remastered refuses to launch. Says my system doesn’t support DX12.
• Nightingale also refuses to launch. Same error.
• A couple of indie games still in development switched from UE4 to UE5 and now crash immediately after trying to launch.

Works just fine on everything else. My card is the Arc A770:

• Can get a reasonably stable 40 fps with ultra settings (including ray tracing) in Cyberpunk 2077.
• Helldivers 2 is great. Had to use launch commands to force DX11 at first, but after a few numbered updates to MESA that’s no longer a problem.
• Baldur’s Gate 3 is great. Avoid the option to launch the game with Vulkan, though. It is really badly implemented and causes very obvious graphical glitches all the time.
• I get a stable 50 fps on KCD 1 on ultra. Though I have only played it for three hours recently (started a new game).
• Very smooth in Sins of a Solar Empire 2, except for truly massive fights (thanks to the large VRAM size my card actually does a better job at rendering large battles than some of my friends with more powerful cards).

For none game related stuff:

• Great performance in Blender 3D, though it’s finnacky to set up and I think I still didn’t do it right (can’t get One API to work), but despite that it still performs fast in cycles.