I have to admit HDR is tricky with voukoder. Currently it is only working with workarounds (i.e. morphinapg s guide for Adobe Premiere: HDR Encoding Guide for Premiere Pro) Some NLEs don't even deliver all needed information to handle HDR and almost all NLE APIs are undocumented (like DVR). I will try to improve it (maybe in voukoders successor app that i'am working on), but this also depends on the NLEs API which has to be prepared for HDR.
I might also talk to the GPU vendors to check in what way HDR is supported by the encoders (or not).
The NVENC AV1s dual encoder gets activated by using the "Faster" or "Fastest" preset.
Thanks for the answer!
Does the preset "faster" and "fastest" worsen the quality?
And probably do you know how to set up HDR using Davinci Resolve settings for AV1? Would really appreciate.