tabViewBottomAccessory does not inherit tab bar vibrancy / foregroundStyle behavior

Hi,

I’m experimenting with the new tabViewBottomAccessory API and I’m running into an inconsistency with how colors are handled compared to the native tab bar items.

Context

When using a TabView, the system tab bar automatically adapts its foreground color (icons and labels) based on the background content (light/dark, images, etc.). This is the expected “vibrancy” behavior.

However, when adding content via .tabViewBottomAccessory, the foreground color does not seem to follow the same logic.

Minimal example :

import SwiftUI

struct ContentView: View {
    var body: some View {
        TabView {
            Tab("Home", systemImage: "house") {
                Text("Home")
                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                    .ignoresSafeArea()
            }
            Tab("New", systemImage: "squareshape.split.2x2") {
                Text("New")
                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                    .foregroundStyle(.white)
                    .background(Color.black)
                    .ignoresSafeArea()
            }
        }
        .tabViewBottomAccessory {
            HStack {
                Image(systemName: "command.square")
                Text("Message test")
                Spacer()
                Image(systemName: "play.fill")
            }
            .padding(.horizontal, 20)
            .foregroundStyle(.primary)
        }
    }
}

Observed behavior

• Tab bar icons and labels correctly switch between dark and light depending on the background.
• Content inside .tabViewBottomAccessory remains black, even when .foregroundStyle(.primary) is used.

Expected behavior

I would expect .tabViewBottomAccessory content to:

• Either inherit the same vibrancy/foreground adaptation as the tab bar items
• Or have a documented way to match that behavior

I want to reuse the Apple Music Navigation