Is it possible to enable HDR on Elder Ring?

On steam, I'm running the game as:

DKVK_HDR=1 gamescope --hdr-enabled -W 3840 -H 2160 -r 166 -f -- %command%

The game launches correctly, but I can't enable HDR inside of the game. I'm on Gnome 48 with HDR enabled.

I've also tried to just launch it with this, same result.

PROTON_WAYLAND_ENABLE=1 PROTON_HDR_ENABLE=1 %command%

Did anyone succeed in running this game with HDR?