Azure Digital Twins now supports bulk delete with the new Delete Jobs API. You can now delete all the entities in a twin graph with a single request to the Delete Jobs API. This eliminates the need to make multiple API requests to individually delete models, twins, and relationships, and avoids error-handling and retries across these multiple requests. Together with the Import Jobs API, you can use Delete Jobs API to delete and repopulate an entire twin graph easily, to enable simulation or environment refresh use-cases.
To learn more about this feature, please visit this doc page.