I know how to tell what orientation an IOS device is in on page load, but how to I detect when the screen is rotated during a page view? Is this possible?
See https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html There is a section named: Handling Orientation Events.
Most probably you will need to handle it with custom JS.