Looks like Valve are actively working on HDR support https://www.pcgamer.com/valves-working-on-hdr-for-linux-gaming-paving-the-way-for-an-eventual-oled-steam-de

Looks like Valve are actively working on HDR support https://www.pcgamer.com/valves-working-on-hdr-for-linux-gaming-paving-the-way-for-an-eventual-oled-steam-deck/ https://www.pcgamer.com/valves-working-on-hdr-for-linux-gami...