Enable Passthrough in Unity

Steps to enable passthrough

1. Open Unity and create 3D universal default project

2. Switch Platform to Android

3. Intall Unity OpenXR Meta in package manger

2. Go project settings > XR Plug-in Management > Enable openXR & Meta Quest feature group for both PC and Android tabs

3. Go to OpenXR (subtab under XR plugin management) > Enable interaction profiles like below for both PC and Android tab

* In my case, I ran into some red issues, but it at least turned yellow when I went 'Player' tab and set minimum API level to level 32 (was 25 before)

4. In Assets > Settings > Select Mobile_RPAsset > Make sure the the two things: (1) HDR Procision is 64 Bits, (2) 'Alpha Processing' is checked

5. Drag the mobile_RPAsset from the asset panel and replace with them

6. In hierarchy panel, remove 'main camera' and create XR > XR Origin. Then you should be able to find the 'main camera' inside the toggle. And make sure you have the same settings like below.

5. Test in your VR headset!