Hello,
Thanks for your queries.
As you found, currently there are no public OpenDXL Streaming services available externally. Having said that, you can use the OpenDXL Databus Java Client to publish and consume to/from any standard kafka cluster, and use the built-in multi-tenancy or push-consumers as additional capabilities.
On the OpenDXL Streaming client, in its designed to interact with solutions like McAfee MVISION EDR, which allow EDR customers to query data from the EDR streaming backend - subject to respective product licensing requirements.
Hope this clear your doubts.
Javier