Can you record a video of it? How about when you physically turn in real world? Trying to figure out if it's up to stick or to rotation generally... I have a Quest 3S and haven't noticed anything like that.
Viewing post in WebXR GDevelop Extension comments
The video capture records at 30 fps and that doesn't seem to capture the right stick stutter. There is no stutter when physically turning my head or turning in place, just when turning with the right stick. (BTW, is there a way to increase the turn speed? I couldn't find it.)
However, it's like the stutter seen in this video when climbing a ladder, but in a horizontal direction, and not as severe as this. I bought the demo project and tried setting it to 72 fps (the Quest's default rate), but that had no effect.
https://drive.google.com/file/d/1hMY7BbfS_dgTqzTEzVLT1aUdCPSfIL5b/view?usp=shari...
That's actually good as right stick rotation has nothing to do with VR (rendering part at least):

This part in Locomotion_Regular event sheet rotates based on right controller stick, so you can try playing with it (remove time delta, change speed, ...) as there are several ways to rotate an object in GDevelop
Increasing those two numbers to 180 (from 90) and 360 (from 45) speeds up the rotation and masks the stutter. I've experimented with changing those numbers and I don't quite understand how they interact, sometimes with no effect past a certain point. Anyway, the increased speed is the speed of turning in the Team Beef Doom VR mod, which is okay for me (and others, apparently, since I've never seen complaints about it on their reddit or discord forums). The stutter is still there in GDevelop if I really look for it, though, so maybe it's something inherent in GDevelop's rendering.
Happy you pointed me to that event sheet since I was also easily able to implement sprinting with the left trigger. We'll see where this takes me.
Do exported games work on gd.games in VR? Have you tried it?
Yup, I just tried it and it works: https://gd.games/avramovic/vr-demo
It doesn't work with the Chrome's Immersive Web Emulator extension because it's being loaded in another frame, but it works from the headset!