Specification for Patient Flags Service API

Suppliers are being asked to register for onboarding to the Patient Flags Service API by the end of June, but the official documentation available for the national service still has significant information missing, such as the schema definition of the Get Patient Flags, Create a patient Flag and Create a supporting resource. An error is returned ‘Schema not found’ when attempting to access. Is the Patient Flags Service - FHIR API - NHS England Digital page the only information available pertaining to the API, or should I be looking elsewhere. When will the Reasonable Adjustment Flag Local System Integration Requirements Specification be updated as how suppliers are being asked to interact with the national asset has changed significantly.