Quite an interesting move on the buzz that (still) is GraphQL and in this case, Hasura have been quite inventive I think by building a cloud/local mechanism to generate GraphQL backends by pointing at (selectively!) PostgreSQL, MySQL and soon to be MS-SQL.  Hasura also helps generate the fine-grained authentication too as well as offering a way to integrate business logic and more.

Some links to get you started:

Main Hasura Site
Direct link to the Hasura docs
A cool learning with Jason; Serverless with Hasura (which looks cool and I actually need to watch myself!)

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