How to get access to react app protected by keycloak without login step?

I have a sample react application using keycloak on a dev stand to get access.
There is a HOC – <ReactKeycloakProvider> on the top level from @react-keycloak/web

I am trying to make it autonomous and proxy all requests to my endpoint (not dev stand).

But don’t know how to login without a server with keycloak.
Are there any way to implement it without creating all openId flow with Authorization Code, ID Token and Access Token