I recommend you to port your existing WinRT app (which has been developed using Crosslight) to Android/iOS platform and use Crosslight Form Builder instead of Xamarin.Forms.

Crosslight Form Builder is a built-in cross-platform form builder framework that helps developers to create native forms easily with UI aesthetics that conforms to each platform’s user interface guidelines. The metadata definiton itself is shared amongst other platforms as well, resulting in a clean, functional form in minutes.

This article will guides you to create a simple taxi order form by utilizing Crosslight Form Builder.

For more advanced scenario, we can extend the capabilities of the Crosslight Form Builder beyond its original capabilities. In this post we’re going to learn how to add an option to choose the driver in CrosslightFormBuilder sample, as well as showing a custom view with the driver’s photo in the form, with the driver’s phone number, which when tapped, will initiate a call to the driver.

Hope this helps.