Getting Eye Tracking to work with OpenXR on HoloLens 2

You have moved your Unity project to OpenXR following Microsoft’s Guidelines and/or my blog post and upgraded to Unity 2020.3.x. Maybe there were some hiccups along the way, but finally you got deploy your OpenXR powered app to your HoloLens 2 - and you found out Eye Tracking is not working. In fac…