Trouble understanding which certificates are for Front End, React, and Back End

This article is about a guy who did front end, React, and back end.

Does this mean he did all of the “Front End Libraries Certification (300 hours)”? And, the React section is included in the “Front End Libraries Certification”, so I’m confused if that’s different.

Which Certification is the back end portion of FCC?

I think these two articles will help you :