Background We are currently building our app with Xcode 26 and the iOS 26 SDK. We want to verify the runtime behavior on iPhone Duo. We have three questions: We haven't adopted SceneDelegate lifecycle management yet. We create the window using init(frame:), with the frame value taken from UIScreen.main.bounds. Will this implementation cause any issues on iPhone Duo? For all non-Auto Layout layouts, we fetch view width by reading UIScreen.main.bounds. Do we need to rewrite all these code points? Will this lead to layout exceptions when the device switches between folded and unfolded states? We observed the system handles fold/unfold compatibility, but black bars appear in both states. Can our app keep consistent view dimensions in both modes? Will viewWillTransitionToSize:withTransitionCoordinator: fire to trigger re-layout when switching between folded and unfolded states?