iOS: How to use a custom UIViewController

Suppose I have a custom MyUIViewController and I'd like to use it in Xamarin Forms for my iOS app. How would I do that?

I noticed PageRenderer derives from UIViewController like so:

public class PageRenderer : UIViewController, IVisualElementRenderer, IDisposable, IRegisterable, IEffectControlProvider

Do I need to create a custom page renderer and derive from MyUIViewController or is there an easier way?