HDP 3.0 is available. We should support it, if possible. Note, there is no-longer any documentation for a non-Ambari install, so there may be issues.
https://hortonworks.com/agreements/support-services-policy/
Clearly says: HDP 2.6 End of Full Support 3 July 2019
Are we planning to support it soon?
Miraj no immediate plans to support. We welcome contributions incase you can pick this up.