According to the Apple’s tutorial in wwdc2023, the origin of coordinate for immersive space is located at the user’s feet. Are there any ways to retrieve the device orientation data in the real world, i.e. the horizontal and vertical angle data of the device?

Several applications need the device heading data, however, the AVP no longer support the CLheading functions because there is no magnetometer, are there any method or algorithm can provide the heading data?