Connecting React Frontend Deployed on Netlify and Node Backend deployed on AWS Elastic Beanstalk

I have a react.js frontend app deployed on netlify and a node.js backend deployed on AWS elastic beanstalk. How do I establish a connection between my frontend and backend? . My sub domain is . I cant seem to find any material on this. Please help on this.

I’m not familiar with Beanstalk. How do you normally connect to it?