The best way to make the ToolbarItemGroup within the toolbar group background clear and with glass impact? [closed]

How can I make the background of a ToolbarItemGroup clear with a glass (blur) impact in iOS 26? Is there a supported technique to obtain this?

I’ve tried to make the background clear but it surely did not work with tintcolor!

import SwiftUI


struct ContentView: View {
    
    var physique: some View {
        NavigationStack {
            VStack {
                ContentUnavailableView {
                    Label("Adapting toolbar components to the Liquid Glass Design System", systemImage: "tray.fill")
                } description: {
                    Textual content("Discover the way to design and implement toolbars in iOS 26 utilizing Apple’s new Liquid Glass.")
                        .padding()
                }
            }
            
            .toolbar {
                ToolbarItemGroup(placement: .topBarTrailing) {
                    Button("Draw", systemImage: "pencil") {
                        // Button motion right here
                    }.glassEffect()
                    
                    Button("Erase", systemImage: "eraser") {
                        // Button motion right here
                    }.glassEffect()
                }
                
                ToolbarSpacer(.mounted, placement: .topBarTrailing)
                
                ToolbarItem(placement: .topBarTrailing) {
                    Button("Save", systemImage: "checkmark") {
                        // Button motion right here
                    }
                    .buttonStyle(.glass)
                    
                    
                    .glassEffect()
                }
            }
            .background(Colour.crimson)
            
        }
    }
    
}

#Preview {
    ContentView()
}