Developers can now use push notifications in React Native apps by uploading developer credentials for iOS and Android in AWS Mobile Hub. The notifications to React Native apps can be sent by any push-service provider. In addition, customers using AWS Pinpoint will benefit from built-in support for analytics, which provides valuable campaign information such as delivery rates and percentage of users opening the app after receiving the notification. 

Source: Amazon Web Services News AWS Amplify Open Source JavaScript Library Adds React Native Push Notifications and Authentication Improvements