C9 (Compute-optimized) and M9 (Memory-optimized) ECS flavors are powered by the 6th Generation Intel® Xeon® Scalable processors and were released on OTC recently. Now, both the C9 and M9 are supported by CCE and CCE Turbo for using as worker nodes.
More details about C9 and M9 flavors can be found in the release notes of C9 and M9. And the ECS flavors supported by CCE are listed in Help Center.