For developing an iOS fully-featured code editor (i.e line numbers + color pass for syntax highlighting + collapsible sections + debug markers/highlights) what would be the best strategy for iOS 27? UITextView with new viewport control delegate Custom TextKit2 UIView Custom TextKit1 UIView (this was the recommendation I got as of WWDC25)

The primary column sidebar in iPadOS 26 has a 10pt padding (not sure if we can access this value programmatically) which we hard-coded for edge inset calculations of the secondary view. It appears this padding is still present with the new design. Can we derive this property reliably somehow?