Windows Mixed Reality, Unreal 5 and HP Reverb G2 headset?

Yes, I am trying it in 5.1

I enabled the SteamVR plugins, and it worked.

Sadly it is blinking when I move around. I have no idea why, maybe because of the Lumen and Nanite. But then it is not happening if I use Oculus Quest 2. Do you have any idea why?