Lazy navigation in SwiftUI - animations issue

App.swift

// Based on "Lazy navigation in SwiftUI" blogpost by Majid Jabrayilov
// Blogpost url: https://swiftwithmajid.com/2021/01/27/lazy-navigation-in-swiftui/
// This gist shows an issue with using conditional NavigationLinks.
// When using StackNavigationViewStyle push animations are not present.

import SwiftUI

@main
struct LazyNavApp: App {
  var body: some Scene {
    WindowGroup {
      NavigationView {
        FirstView()
      }
      .navigationViewStyle(StackNavigationViewStyle()) // comment this line to fix missing animations when pushing views
    }
  }
}

// MARK: - First screen

struct FirstView: View {
  @State var second: Second?

  var body: some View {
    ZStack {
      Color.yellow.ignoresSafeArea()

      Button(action: { second = Second() }) {
        Text("Present Second")
      }
    }
    .navigationTitle("First")
    .navigate(using: $second, destination: SecondView.init(second:))
  }
}

// MARK: - Second screen

struct Second {}

struct SecondView: View {
  var second: Second
  @State var third: Third?

  init(second: Second) {
    self.second = second
  }

  var body: some View {
    ZStack {
      Color.green.ignoresSafeArea()

      Button(action: { third = Third() }) {
        Text("Present Third")
      }
    }
    .navigationTitle("Second")
    .navigate(using: $third, destination: ThirdView.init(third:))
  }
}

// MARK: - Third screen

struct Third {}

struct ThirdView: View {
  var third: Third

  var body: some View {
    ZStack {
      Color.gray.ignoresSafeArea()

      Text("Third")
    }
    .navigationTitle("Third")
  }
}

// MARK: - Navigation utils

extension NavigationLink where Label == EmptyView {
  init?<Value>(
    _ binding: Binding<Value?>,
    @ViewBuilder destination: (Value) -> Destination
  ) {
    guard let value = binding.wrappedValue else {
      return nil
    }

    let isActive = Binding(
      get: { true },
      set: { newValue in if !newValue { binding.wrappedValue = nil } }
    )

    self.init(destination: destination(value), isActive: isActive, label: EmptyView.init)
  }
}

extension View {
  @ViewBuilder
  func navigate<Value, Destination: View>(
    using binding: Binding<Value?>,
    @ViewBuilder destination: (Value) -> Destination
  ) -> some View {
    background(NavigationLink(binding, destination: destination))
  }
}