Hi there,
I am an experienced React, React Native developer I have read your project description, and understand what you actually need I have recently completed a project that communicates between react-native to native (Android and Ios), I can share the POS if you need. there is two way to do this 1) via the react-native bridge and one via delegates method in both cases we have to register an event in both native and react native.
For more detail please Inbox
Thanks and Regard
Sajid Ali