NavigationView has only been soft deprecated, so will still function on iOS 16. As for manually back deploying, since NavigationView has been split into two parts but come with added components, such as a path and control over column visibility as well as the new NavigationLink(_:value:) and navigationDestination modifier, it would be quite difficult to accomodate all of this.
Topic:
UI Frameworks
SubTopic:
SwiftUI
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