unity/WebXR on iPad, tracking user(player)'s camera position and rotation

I am trying to anchor a UI panel onto the user’s camera(perspective).
For this, a UI-tracker C# script was added.

It runs well in needleEngine-webXR.
Also, it works well in Unity Editor simulation without exporting to webXR.

But if it enters the AR session through needle-webXR, The UI-panel doesn’t follow user’s position and rotation anymore.
it seems like just staying based on the XR-rig.

Is there a way to get the player(user)'s position and rotation? even it enters to the AR session?

Currently, I am testing on my iPad Chrome browser.

I’m sorry, I couldn’t find a response but notified the team :exploding_head:

also, I wonder if it works for metaQuest-webXR.