SOLVED: Intel QuickSync on Docker?

[homelabResearcher]

So I have followed some guides that said to add to my docker compose file this

Code:

- devices:
  /dev/dri/renderD128:/dev/dri/renderD128
  /dev/dri/card0:/dev/dri/card0

And VAAPI seems to work, but not QuickSync, at least VAAPI lets me select the renderD128 in the dashboard > playback while QuickSync doesn't.

Yes, I have a modern Intel CPU, a N100, driver in Docker is 23.xx (can't recall right now) and also have it on my OS.

Using Ubuntu 24.04 Server (dev builds). Doesn't seem like a problem from Ubuntu.
I am also using the official Docker image, from Jellyfin

Same build here. You may check whether your user is able to write to these devices in docker console. Don't just chmod them since permissions of these devices will be reset after reboot.