Since the official react native example provided by React Native didn't work on Android, I fixed it and published it here.
First, clone the repository and install its dependencies:
git clone https://github.com/jkomyno/react-native-maps-example
cd react-native-maps-example
npm i
The native dependencies should already be linked, if not then just follow the instructions in the official AirBnB's readme.
Check out the "meta-data" tag in android/app/src/main/AndroidManifest.xml and add your API key there.
react-native run-android