NavigationStack back button ignores tint when presented in sheet

[Also submitted as FB21536505]

When presenting a NavigationStack inside a .sheet, applying .tint(Color) does not affect the system back button on pushed destinations. The sheet’s close button adopts the tint, but the back chevron remains the default system color.

REPRO

1. Create a new iOS project and replace ContentView.swift with the code below.

—or—

1. Present a .sheet containing a NavigationStack.
2. Apply .tint(.red) to the NavigationStack or sheet content.
3. Push a destination using NavigationLink.

EXPECTED

The back button chevron adopts the provided tint color, consistent with other toolbar buttons and UIKit navigation behavior.

ACTUAL

The back button chevron remains the default system color.

NOTES

Reproduces consistently on:

• iOS 26.2 (23C54)
• iOS 26.3 (23D5089e)

SCREEN RECORDING

SAMPLE CODE

import SwiftUI

struct ContentView: View {
    @State private var isSheetPresented = false

    var body: some View {
        Button("Open Settings Sheet") {
            isSheetPresented = true
        }
        .sheet(isPresented: $isSheetPresented) {
            NavigationStack {
                List {
                    NavigationLink("Push Detail") {
                        DetailView()
                    }
                }
                .navigationTitle("Settings")
                .navigationBarTitleDisplayMode(.inline)
                .toolbar {
                    ToolbarItem(placement: .automatic) {
                        Button("Close", systemImage: "xmark") {
                            isSheetPresented = false
                        }
                    }
                }
            }
            .tint(.red)
        }
    }
}

private struct DetailView: View {
    var body: some View {
        List {
            Text("Detail View")
        }
        .navigationTitle("Detail")
        .navigationBarTitleDisplayMode(.inline)
    }
}