How to replace UIWebView with WKWebView?

I was looking at this example: https://developer.xamarin.com/guides/ios/user_interface/controls/uiwebview/, and I did in Xamarin.Forms a WebView, and I'm trying to replace the UIWebView with WKWebView, can I achieve this somehow?

I've tried to do a custom render, but I don't know where to replace the UIWebView with WKWebView, because the second one is faster, and my app will work more faster with this option.