React Native Help

I have an example React Native program that shows how to have a React view mixed with a Native View.
I also have an Android native view (java) and IOS native view (C) that I would to merge into the Example program.
So I can replace the example native view with the Andriod and IOS view.
See
https://blog.logrocket.com/build-native-ui-components-react-native/
https://github.com/hrupesh/RN-Native-UI-Components