Nothing on that page is about passing data around. It's about whether or not you should manage state locally in the component, or globally in the state manager. In cases where you choose to hold the data in the global state manager you access the state manager (in React) via a context provider. That context provider is not a part of Redux - it's react-redux as isakkeyten noted.

I understand that this probably feels incredibly pedantic but it's quite important to frontend engineers like me. Redux is only a state manager, and it is not a React library.