❔ my delegate event is not raising the event

   public partial class CustomerListViewModel : ObservableObject
    {
        public CustomerListViewModel()
        {

customerCollection = new ObservableCollection<Customer>();
Customer jacob = new Customer("Jacob", "Woord", "Urk");


          

customerCollection.Add(jacob);
           


        }

        
       public event Action<Guid> PlaceOrderRequested = delegate { };
        
        [RelayCommand]
        void PlaceOrder(Customer customer)
        {
            PlaceOrderRequested(customer.CustomerId);
        }

namespace viewModelBinding
{
    public partial class MainWIndowViewModel : ObservableObject
    {
        //intialize every vieModel
        private CustomerListViewModel customerListViewModel = new CustomerListViewModel();
        
        private OrderListViewModel    orderListViewModel = new OrderListViewModel();
        

        private Timer timer = new Timer(5000);
        public MainWIndowViewModel()
        {
            customerListViewModel.PlaceOrderRequested += CustomerListViewModel_PlaceOrderRequested;
            currentViewModel = new OrderListViewModel();
            timer.Elapsed += (s, e) => NotificationMessage = "Na 5 seconden word de huidige tijd neergzet: " + DateTime.Now.ToLocalTime() + " Kukulukuu";
            timer.Start();
        }

        private void CustomerListViewModel_PlaceOrderRequested(Guid obj)
        {
            orderListViewModel.CustomerId = obj;
            CurrentViewModel = orderListViewModel;
        }

        [ObservableProperty]
        object currentViewModel;

        [ObservableProperty]
        string notificationMessage;