React-Native & Redux - doens't have 'index.js' entry file

Question

I've created my app with react-native and expo thru expo init <project name>.

once I've made my app. I need to deploy redux in my app.

Once I study about redux, in order to deploy it into my react app, I need to wrap index.js file with <Provider>.

However, when I created my app with expo, menu looks all

I doesn't have index.js file.

So instead I wrap Provider in App.js like below.

 return (
    <Provider stroe={store}>
      <ApolloProvider client={client}>
        <NavigationContainer>
          {isLoggedIn ? <LogggedInNav /> : <LoggedOutNav />}
        </NavigationContainer>
      </ApolloProvider>
    </Provider>

is that okay? and why I don't have index.js file as an entry file?