I assume you meant version 2.3.6, which was recently released. But regardless, where did you see that?
AFAIK Hubitat staff have never publicly announced a timeline or specific plan re: z-wave long range, although it should be technically possible for them to implement at some point.
That was true in prior releases, and in the most recent firmware release.
Anytime you’re uncertain about what’s included in a platform update, check out the release notes. Here’s the 2.3.6 release notes thread.
Edit: oh wait I see, 2.2.6 was mentioned in one of @bcopeland’s announcements in an old thread linked above. And the announcement said they were planning to enable it, not that it was already enabled.
No you haven’t missed anything. Presumably since that announcement was made, they decided to focus on a few other things that have since been released for general usage, or are currently in public beta.