For example Graphcms, Prismic, etc. You get the standardization of Graphql (which means no lock-in) and pretty much as powerful as SQL really.
You also get the admin/dashboardy/WYSIWYG aspects of a CMS - https://prismic.io/feature/custom-type-builder
Very easy integration - https://medium.com/better-programming/graphql-combine-and-sw...
(of course this works just as well on Android, React Native/Web,etc)