[vidarh]

We didn't use GraphQL, but in my last company that was essentially what we did - every API call returned schema information about the parts of the model the current user had access to, with detailed type information and which validations to apply, and metadata that affected presentation, and the frontend built a UI from that.

We then let designers/frontend devs override that on a case by case basis instead of building from scratch, and where possible tried to roll that into the generic UI as components triggered by specific metadata from the backend. It was not entirely agnostic, but it was largely driven by metadata from the backend, so e.g. schema changes rarely needed much, if any, UI work unless they fundamentally changed how the page worked.