WebXR AR (argumented reality) via Quest Link - Open the Passthrough

I am developing an WebXR AR (Argumented Reality) App and would like to start it via the Quest Link Connection in the Browser to harness the PCs rendering power.

The WebXR app works in VR mode but doesn't allow me to open in the AR mode. I enabled the Passthrough option in the Beta Settings in the Quest Link App. The AR works without the Quest Link.

Is this supposed to work?

I am using the Quest 3 Headset (newest software, updated my PC, updated the drivers everything, tried to restart everything multiple times)