React Native Mobile app Migration to xamrian form

We have React Native Mobile app which we want to migrate to Xamarin form.

Existing App Technologies:
* React Native
* RealmDB


Target App Xamrian Platform :
* Xamarin form
* mvvmcross framework
* Local Database - (To be selected)

Note: We have to use the existing APIs which are used in React Native code.

Total No of Forms : 10+

Login
Dashboard
Product Search - Bar code / Product code
Product Details - (Tagged Item)
Add Plain Item
Add URD Item
Sales Cart
Customer Search
Add New Customer
Payment


Features :
Bar code Scan
On Right Swipe - Add Item to Cart
On Left Swipe - Open Product Search
Caching data around 15-20 master tables Using local database (Products,Units,Rate etc)

Note :
* We will explain the React Native Code and Functionality if required
* We would like to use the mvvmcross framework with Xamarin form
* Proper Architecture Design is MUST - for further enhances.
* We don't need any documentation but you need to clarify the doubts related with app design and coding.