private async void NavigateToModalPage(object? sender, EventArgs e)
   {
       var result = await _navigationService.CreateBuilder()
           .AddNavigationPage(true)
           .AddSegment("modalPage", x => x.UseModalNavigation())
           .NavigateAsync();

   }

 private async void CloseModalPage(object? sender, EventArgs e)
    {
        var result = await _navigationService.GoBackAsync();
    }