'SwiftUI how to force a divider for navigation bar in NavigationView

My app has simple navigation logic using navigation view. I use the inline style navigation bar:

mainView
  .navigationBarTitleDisplayMode(.inline)

I notice that the navigation bar's divider is missing for the root view. And it appears when I scroll up the content a bit.

This first screenshot shows the initial state (without nav bar divider):

This second screenshot shows the state when I scroll up the content a bit, and it shows nav bar divider:

Is it possible to always show the divider without scrolling?

ios swiftui

Sources

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