A project written in react native, we need to set up a subscription

A project written in react native, we need to set up a subscription in the application via the revenuecat.com service. Nothing complicated for someone who knows how to work on a react native.

I am attaching the project.
https://drive.google.com/file/d/1i1VH8YYbxZ4BKGQs-B3d5Mo41u5OlHZR/view?usp=sharing