VR icon isn't showing in mobile Safari (iOS)
The VR viewer icon used to be there and has disappeared from my embed. What happpened?
The recent iOS 12.2 update (March 2019) changes Safari so that you have to enable motion data access to the Safari browser (we need motion data in order to figure out what direction you’re looking in VR mode).
To grant access:
Go to Settings, scroll down and tap on the Safari section:
Scroll down and there will be an entry “Motion & Orientation Access”:
Enable it so it’s on:
If you go back you should now see the VR icon.