Regarding incomplete topics that are not covered

Does anyone know the status regarding the incomplete topics like showing Google Maps, top tabs on the main listing page, etc.

did you managed to do this section ?

No … was just asking for any updates for those missing parts.
have anyone completed it?

Google Maps is not part of the React/or Native courses. It belongs to Google API, every mature company out there has its own API for React/Angular/regular JS/JAVA/PYTHON, etc, you can read their instructions on how to implement it on your app. Expo does have support for some, for example, payment system for Stripe.