React - Provide Global Singleton From Composition Root - reactjs

Question

To start off, I have been working with React now for three months and the application I am building is testable, performant, etc... Nothing wrong. My experience pre-React is from the Angular world and what is considered a best practice there is not normally in react and vice-a-versa... I don't think what I am doing is wrong for the application I am building also don't want to miss anything big.
To make a long story short, inside of my App.tsx (using TypeScript) file I am creating a new instance of a singleton service and exporting it as a named export. For example, my app component looks something like:
import * as React from 'react'
... axios import here
import { HttpService } from './core/http.service';
import { Spinner } from './shared/spinner';
const axiosInstance = Axios.create({config here});
const httpService = new HttpService(axiosInstance);
class App extends React.Component {
props: any;
state: any;
constructor(props: any) {
super(props);
}
render() {
return(<App Root Component Here...>)
}
}
export { httpService };
export default App;
Imagine a component somewhere in the app that needs to use my singleton service. For the purposes of my question, I will call the component Home (home/Home.tsx).
import * as React from 'react'
import { httpService } from '../App';
class Home extends React.Component {
props: HomeProps;
state: HomeState;
constructor(props: HomeProps) {
super(props);
this.state = {
isLoading: false,
myData: []
}
this.loadData = this.loadData.bind(this);
}
componentDidMount() {
this.loadData();
}
// Using httpService here.
loadData() {
this.setState({isLoading: true});
httpService.get('/api/somedataurl').then((response) => {
const { data } = response;
this.setState({myData: data});
}).then(() => {
this.setState({isLoading: false});
});
}
myDataList() {
return (<ul>...{map of this.state.myData}</ul>)
}
render() {
return this.state.isLoading ? (<Spinner>) : this.myDataList();
}
}
export default Home;
I decided to use this implementation because I know that I can always rely on the App component to be available and there are no plans for server-side rendering.
As a simple solution, is there anything seriously flawed with providing my singleton service as a named export and importing into other components as needed?