They have to export it because they aren’t eating it.

Try gamescope with the —hdr-enabled launch option

HDR is enabled in Plasma? Does your desktop look washed out when it’s enabled as well?

What launch options did you use for gamescope?

I use one of these as well. Works great! As another comment said, it can sometimes take a moment to connect, other times it’s nearly instant. Paired with a wireless charger for long trips, I never have to plug anything into my jack.

Makemkv is great.