Toolbar Item is not updating after items are deleted from core data in SwiftUI

Question

I have a problem. I have a view which contains a toolbar item, a "Shopping Cart - displays how many items are in the cart". I have a screen which contains a button, and after the button is pressed, all the items from the entinty "LocalName" are deleted, so basically there is no item left there, but the "Shopping Cart number of items " is not updating. Is updating only after the application is terminated and opened again.

I will share my code below :

struct OrderCompletedVieww: View {
    @StateObject var coreDataViewModel = CoreDataViewModel()
    @Environment(\.managedObjectContext) private var viewContext
    @FetchRequest(sortDescriptors: [])
    private var menus : FetchedResults<LocalMenu>
    var body: some View {
        VStack {
            Button {
                let fetchRequest: NSFetchRequest<NSFetchRequestResult> = NSFetchRequest(entityName: "LocalMenu")
                let deleteRequest = NSBatchDeleteRequest(fetchRequest: fetchRequest)
                        do {
                            try
                            coreDataViewModel.manager.context.execute(deleteRequest)
                        } catch let error as NSError {
                        }
                    coreDataViewModel.saveContext()
                
            } label: {
              Text("Delete menus")
            }
            .padding()
            
         
                
        }
     
    }

    
}

struct MainVieww: View {
    @EnvironmentObject var syncViewModel : SyncViewModel
    @Environment(\.managedObjectContext) private var viewContext
    @FetchRequest(sortDescriptors: [])
    private var menus : FetchedResults<LocalMenu>
    var body: some View {
        NavigationView{
         MeniuriView()
                .toolbar {
                    ToolbarItem(placement: .navigationBarTrailing) {
                        ToolbarButtons(numberOfProducts: menus.count)
                }
                    }
            }
         
        }
    }
  

struct ToolbarButtons: View {
    @Environment(\.managedObjectContext) private var viewContext
    @FetchRequest(sortDescriptors: [])
    @State var pushActive : Bool = false
    var numberOfProducts : Int
    
    var body: some View {
        ZStack {
            Spacer()
                NavigationLink(destination: CartView()
                                .toolbar {
                    ToolbarItem(placement: .navigationBarLeading) {
                        Text("Cos")
                            .font(.system(size: 24))
                            .bold()
                    }
                }
                               , label: {
                    ZStack(alignment: .topTrailing) {
                        Image("cartIcon")
                            .padding(.top, 5)
        
                        if numberOfProducts > 0 {
                            Text("\(numberOfProducts)")
                                .font(.caption2).bold()
                                .foregroundColor(.white)
                                .frame(width: 15, height: 15)
                                .background(Color.tabItemColor)
                                .cornerRadius(50)
                                .offset(x: 10, y: -8)
                        }
                    
                    }
                }
                )

            }
    }
}