On Heroic Games Launcher, activate 'Auto Install/Update DXVK-NVAPI on Prefix'. If I add --launcher-skip, DLSS is not available in the game (probably a problem with the environment variable not passing in the Cyberpunk.exe).

The first benchmark hangs on loading, but works fine after restarting. No further problems after the first benchmark.

DLSS Ultra Performance + Ultra settings with Path Tracing is constant at 40 fps in 4k. No Frame Generation used since DLSS3 is not available right now on Linux. FSR3 with Frame Generation or Intel Xess seems to work too.