If the Connection screen reports Rotation Sensor unsupported, the device cannot provide the needed sensor input. Use Gesture Controls or Walk controls instead.
World Tracking requires ARCore support and camera permission. If calibration remains weak, move to a brighter environment, point toward textured objects or corners, avoid reflective/plain surfaces, and move the phone slowly. Recalibrate after changing environments.
Use Reset Position and Reset Rotation, then check World Scale, Smooth Filter settings, Lock Height, and Horizon Lock. Any of these can make movement feel constrained or incorrect when their state is misunderstood.