In `Xamarin Forms` I can't find a component for a `RadioButtonList` (like in WinForms or WPF) and also it's not bindable. With this component you have a bindable `RadionButton`. You see an example below for Android.
Example for iOS
Example for UWP
This component has its implementations for each platform (Android, iOS and UWP). You have to install them or create your renderers.