Hi @ankita.juyal,
Welcome to the Community!
I may be misinterpreting your question, but do you want to issue Access Token to unauthenticated users? For your app to be issued an Access Token, the user would have to log in. In the React SDK, you can do this through a redirect or a popup.
The Login Required Error will occur if the ID Token is expired or not present in storage. The React SDK will store tokens in memory or localstorage depending on the chacheLocation property passed to the Auth0Provider.