[HELP] How to implement new function to call JS from native app root

Hi everyone,
I’m working on customizing mobile Jitsi SDK for my iOS app. I see the only point where we can communicate with the app root is when we set props on JitsiMeetView with join and leave. Now I would like to implement a new communication, eg. call a function on root or send an event with parameters to React.
I’m a newbie at React, React Native and objective-c :see_no_evil:. I read it is possible to use React Native Events to call javascript function from a native component, but how about app root, JitsiMeetView? Could you help me with some hints?

Thank you in advance for your answer! Best regards.