Install the [HoloMonApp_arm64.appxbundle] on your HoloLens 2 to experience the application. [appxbundle] installation procedure can be found in the following article.

https://bluebirdofoz.hatenablog.com/entry/2021/07/06/212811

A link to a video explaining the application is below.

https://www.youtube.com/watch?v=sV8kFAHjP2g

When checking the operation of the application in UnityProject, go to [File -> Build Settings...] and change the [Platform] to [Universal Windows Platform]. HoloMon sleeps between 9:00 PM and 6:00 AM.