You have it wrong, only the restaurant dashboard app is built using ReactNative, that was done because they had a website earlier and they wanted to convert tha

You have it wrong, only the restaurant dashboard app is built using ReactNative, that was done because they had a website earlier and they wanted to convert that quickly to a tablet app and their developers who were working on that web app had very limited knowledge of iOS/Android, refer to https://eng.uber.com/ubereats-react-native/ https://eng.uber.com/ubereats-react-native/