To expand.
here you should be getting your React Server to generate an App Access Token (aka Client Credentials)
Then your front end will call your backend, and the backend performs the API call
Your backend may also then utilise Webhooks for Stream Updates if thats useful and/or caching to negate the need to call the Twitch API at all.
(Why go fetch data if you already fetched it in the last 5/10 minutes (or cache as relevant depending on the endpoint))