Could someone tell me exactly how this supabase on().subscribe() function works? I'm working in React Native.

What part of the docs (https://supabase.com/docs/reference/javascript/subscribe) are you having trouble with?

Nothing really happened. I put this code into my file where I get data from database

Did anything change on the table you're subscribed to (e.g. was a new row inserted, updated, or deleted)? Realtime will only trigger if something changes in the table

Yes, I'm inserting new rows and listening to all events...