On all apps that I can find that use Cardboard in iOS 14 (iPhone), the VR view is insanely bugged. The camera swings wildly all over the place.
Here is a video example: https://www.reddit.com/r/youtube/comments/i1nbs0/ios_14_vr_error/
The official Google Cardboard app-store application is broken as soon as you start it. It is also broken on the app I develop for which uses GVR and Unity.
Weirdly, it will temporarily function as expected if you restart your iPhone. The time it takes to break is seemingly random - sometimes it will be broken right away, and sometimes it will work for hours before breaking.
We have tested this on two iPhone 8+, and an iPhone 11.
Things I have tried:
Turns out GVR is now obsolete for IOS14 (unless someone makes a fix for it.. doubt it). Have to upgrade to Cardboard SDK. https://github.com/googlevr/cardboard/issues/118