How to use Gesture?

[jyswjjgdwtdtj]

I copy the example codes, but it do not run. This is my code;

 GestureRecognizers.Add(new ScrollGestureRecognizer()
 {
     CanVerticallyScroll = true,
     CanHorizontallyScroll = true,
 });
 GestureRecognizers.Add(new PinchGestureRecognizer());
 AddHandler(Gestures.ScrollGestureEvent,  (s, e) => { Console.WriteLine("Scroll"); });
 AddHandler(Gestures.PinchEvent, (s, e) => { Console.WriteLine("Pinch"); });

When I pinch or move two of my finger on my trackpads, nothing is printed to Console.
Does "Gesture" only supports Image control? I found that all the examples attach these event on Image.

And how to use pointer events in controls except Button? Is it supported to use pointer events in other controls? What's the relationship between Gestures and Pointers? Are ScrollGesture and PointerWheelChanged the same?
I can't fire any of these event on my Custom Control.😭😭😭
Help me please🙇🙇‍♂️🙇‍♀️ Thank you!