Nreal, follow their guide for setting up the Unity environment for the Dev Kit: https://developer.nreal.ai/develop/unity/android-quickstart
Hololens 2, follow their guide for setting up the Unity environment for Windows: https://docs.microsoft.com/en-us/windows/mixed-reality/mrlearning-base
Now to go to our website to download the unity binary:
Must have unity Unity 2019.2.18 installed inorder to do development for the Nreal or Hololens 2 platforms, follow the quickstart guides to get the base environment setup for each device:
https://developer.nreal.ai/develop/unity/android-quickstart
https://docs.microsoft.com/en-us/windows/mixed-reality/mrlearning-base-ch1