Not directly available in the RP user interface
In the current version this is achieved via service requests to the technical team. You can use the Raise an Issue form (or raise an INFRA devops support ticket directly in JIRA) to request a new report (either in an existing category, or requesting a new one), as done for AP issues and improvement requests. This will be processed and prioritised along with other AP and RP feature/improvement requests for inclusion in a future release.