Why the mini-map designed using UI in Unity is not visible after deployment to Hololens 2?

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Based on the image you provided, the mini-map is visible in the Unity game panel. However, it didn’t appear in the HoloLens after the application was deployed as you mentioned.

To make the UI elements work on the HoloLens, you can convert the Unity canvas to MRTK canvas by following these steps:

1.       Select Canvas object in your scene, then in the Inspector panel for your Canvas, click on "Convert to MRTK Canvas"

2.       Click on "Add NearInteractionTouchableUnityUI"

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