How to paste copied rows to the empty UWP DataGrid (SfDataGrid)?

public class SfDataGridBehavior : Behavior<SfDataGrid>
{
    protected override void OnAttached()
    {
        base.OnAttached();
        this.AssociatedObject.GridCopyPaste = new CustomCopyPaste(this.AssociatedObject);
        this.AssociatedObject.SelectionController = new CustomGridSelectionController(this.AssociatedObject);
        this.AssociatedObject.Loaded += AssociatedObject_Loaded;
    }
 
    private void AssociatedObject_Loaded(object sender, Windows.UI.Xaml.RoutedEventArgs e)
    {
        this.AssociatedObject.GetVisualContainer().PointerReleased += SfDataGridBehavior_PointerReleased;
    }
 
    private async void SfDataGridBehavior_PointerReleased(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e)
    {
        await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
        () =>
        {
            if (this.AssociatedObject.View != null && this.AssociatedObject.View.Records.Count == 0)
            {
                this.AssociatedObject.Focus(Windows.UI.Xaml.FocusState.Programmatic);
            }
        });
    }
}