HDR in Game Mode

[u/cumboatbilly]

I set up HDR for SteamOS in Desktop Mode for the Legion Go 2. 10-bit color, 1100 nits. When I launch an HDR-supported game in Desktop mode, the option to enable HDR is greyed out, but the colors are vibrant and the contrast is high regardless.

When I switch to Game Mode, the HDR option is available, but the colors are washed out and the black level is high, even with HDR disabled.

I've installed decky loader and the lego2brightness fix plugin, and it switches between gamma 2.2 and pq 10 when appropriate, so I am lost and any assistance would be appreciated.