I posted this issue on Meta’s github https://github.com/Oculus-VR/UnrealEngine/issues/516 but sometimes they take forever to respond, so I am asking here too 
Basically I followed one of the youtube tutorials about making portal in UE5 and got it working just fine in PIE (Android Vulkan Preview), but it doesn’t work on Meta Quest 2+.
PIE:
Device:
If I simply make render target asset and assign it to the scene capture 2d, and then make static texture out of it and assign it to the texture sample node in the material - it kinda works, but it’s blurry/aliased badly, low rez, doesn’t update real-time and the math behind making sure captured view matches camera’s view doesn’t work.