The REST acronym, more often than not, means Representational State Transfer. Red Hat, for its part, asserts https://www.redhat.com/en/topics/api/what-is-a-rest-api on how an application uses an API to address other software.
Back in February 2019, https://crystallize.com/blog/why-we-killed-our-rest-api-in-favour-of-graphql, “We have now killed off our REST API entirely and replaced it with GraphQL.
I can fetch data from databases, I can even build GraphQL APIs on top of other GraphQL APIs, or on top of REST APIs.
I can use them together by building a GraphQL API on top of a REST API, as a data source.”