OVRCameraRig で、Oculus のジャイロセンサーが無効化されてしまう件。ConfigureEyeAnchor を一行無効にせよ。
private Transform ConfigureEyeAnchor(OVREye eye)
{
  string name = eye.ToString() + "EyeAnchor";
  Transform anchor = transform.Find(name);
  
  if (anchor == null)
  {
    string oldName = "Camera" + eye.ToString();
    anchor = transform.Find(oldName);
  }
  if (anchor == null)
  anchor = new GameObject(name).transform;
  anchor.parent = transform;
  anchor.localScale = Vector3.one;
  anchor.localPosition = Vector3.zero;
  // idehara
  // anchor.localRotation = Quaternion.identity;
  return anchor;
}