This post is from the Activity iPhone Duo UIKit Q&A.
The cover and inner displays have different aspect ratios and (presumably) different safe area insets/notch or camera cutout geometry. Is there guidance on how safe area layout guides should behave across the fold transition — do they update automatically as part of the same trait-change/relayout pass, or do we need to explicitly recompute cached safe-area-derived constants (we currently cache statusBarHeight off the "foreground active" window scene)?