The mouse event of the series is not fired because the series element itself is a canvas with size 0,0. If you tell me why you need to use the mouse event I could think of a suitable solution for your case.
Want to extend the target reach of your WPF applications, leveraging iOS, Android, and UWP? Try UI for Xamarin
, a suite of polished and feature-rich components for the Xamarin framework, which allow you to write beautiful native mobile apps using a single shared C# codebase.