SwiftUI Navigation on iPad - How to show master list

Question

My app has simple navigation needs

• List View (parent objects)
• List View (child objects)
• Detail View (child object)

I have this

Answer 1

In portrait the default split view does not work. This may be fixed in future but it appears the current options are:
(a) change the navigation view style of your first list to .navigationViewStyle(StackNavigationViewStyle()) so the navigation will work like on iPhone and push each view.

(b) leave the style to default and only support landscape for iPad

(c) implement a UIKit split view controller