How to apply sorting for the new items added in Xamarin SfDataGrid?

public MainPage()
{
      InitializeComponent();
      viewModel = new ViewModel();
      dataGrid.ItemsSource = viewModel.OrdersInfo;
      dataGrid.AllowSorting = true;
      dataGrid.GridLoaded += DataGrid_GridLoaded;
      dataGrid.SortColumnDescriptions.Add(new SortColumnDescription() { ColumnName = "EmployeeID", SortDirection = ListSortDirection.Descending });
 
}
 
private void DataGrid_GridLoaded(object sender, GridLoadedEventArgs e)
{
      dataGrid.View.LiveDataUpdateMode = LiveDataUpdateMode.AllowDataShaping;
}