Flutter is just the same as any other client (React, Angular, Vue, Svelte). Cloud DGraph is made to be called through graphql. There are no specific DGraph modules for any frontend framework. You just call a graphql module (usually Apollo, URQL, or simply fetch) that is specific to that Framework. If you’re not using GraphQL, but DQL, you have to write your own backend, which does not effect the frontend frameworks regardless.
For Flutter, simply use graphql-flutter:
All of the rules for graphql and dgraph do not change: token management, filtering, etc…
J