Thank you so much Mauro! You saved my life. You're right, there are so many tutorials out there regard to Google Map, but no tutorial show me how to build with Expo properly. After built, the app crashed by the beginning. Event the Expo tutorial regard to MapView, they don't explain clearly that there is a way to get the SHA-1 Certificate Fingerprint in the development build, and how to add the api key in the app.js file.
I signed up the Google Play Console account, then I found your article while waiting for Google Play review.
Thank you thank you! :)