I was wondering if there are any plans to have the Holistic Detection (face + pose + hand tracking) implemented in MLKit, or if there is an easy and efficient way to add the face and the hand detection to the pose detection results.
We are looking at this indeed. However, since it is a very compute intensive set of tasks, we want to make sure it can run on a wide range of devices, rather than just flagship phones. If you are looking for this functionality today, I would go with the MediaPipe solution like you reference as well.