Xamarin Drag and drop how to edit balloon icon and text see image

Question

Using the drag drop sample https://github.com/xamarin/xamarin-forms-samples/tree/main/WorkingWithGestures/DragAndDropGesture I'm not sure its actually a notify balloon not sure of its correct terminology making it hard to search. In the image you can see when drop location is active it displays in the ballon the copy icon and copy as text. I want to change the icon and the text but not sure how. I have tried the following code but it doesn't do anything.

private void OnCorrectDragOver(object sender, DragEventArgs e)
    {
        e.Data.Text = "My text data goes here";
        e.Data.Image = "plusicon.png";
    }