VisionOS Hand Skeleton Default Pose

Hi, Is there a known default pose for the hand skeleton for VisionOS? There's the HandSkeleton.neutralPose but the matrices are all identity.

Is there a certain shape to it? ie in the WWDC Video https://developer.apple.com/videos/play/wwdc2023/10111/

They are using Astronaut gloves, but in what position were these modelled? Fingers forward with the thumb at 90 degrees etc?