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As mentioned previously, you can read the docs for the react-native-maps project to learn more about the features of this excellent library (https://github.com/react-community/react-native-maps). For instance, you can easily customize the appearance of your Google map by using Google Maps Styling Wizard (https://mapstyle.withgoogle.com/) to generate a mapStyle JSON object, then pass that object to the MapView component's customMapStyle property. Or, you could add geometric shapes to your map with the Polygon and Circle components.

Once you're ready to deploy your app, there are a few follow-up steps that you will need to take to take to ensure the map works properly on Android. You can read the details on how deploying to a standalone Android app with a MapView component works in the Expo documentation at https://docs.expo.io/versions/latest/sdk/map-view#deploying-to-a-standalone-app-on-android.