The image you've attached is that of a Carousel control, the RadSlideView is a different type of control.
If you'd like to see us add a Carousel control (or a "Carousel mode" to SlideView) to UI for Xamarin, you can add a feature request here in the Feedback Portal
(select "Feature Request").
Lance | Tech Support Engineer, Sr.
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items