How to send automatic notifications in react native using firebase cloud messaging

Question

I am new to react native and have created an app which displays events. I would like to have the app send background notifications each time a new event has been added to the app.

After doing some research I have found that the best way to send background notifications is to use firebase cloud messaging. This seems to only allow messages to be sent from the firebase website console. I was wondering if there is a way to have a notification send when something is added to the app without have to keep going into the firebase console.

I have been able to get firebase to send background notifications on iOS. Here is my code

const getFcmToken = async () => {
  const fcmToken = await messaging().getToken();
  if (fcmToken) {
      console.log("Your Firebase Token is:", fcmToken);
  } else {
      console.log("Failed", "No Token Recived");
  }
};

export default class App extends React.Component {
  requestUserPermission = async () => {
    const authStatus = await messaging().requestPermission();
    const enabled =
      authStatus === messaging.AuthorizationStatus.AUTHORIZED ||
      authStatus === messaging.AuthorizationStatus.PROVISIONAL;
      if (enabled) {
        getFcmToken();
        console.log('Authorization status:', authStatus);
      }
    };

    async componentDidMount() {
      await this.requestUserPermission();

       // Register background handler
       messaging().setBackgroundMessageHandler(async (remoteMessage) => {
       console.log('Messaage handled in the background!', remoteMessage);
  });
};
}