Yep, the 2016 Kx series 7,8 & 9 can become a hub with the need of the extend, if you don’t already have a smartthings hub…
This is indeed a “beta” & invitation only & “America First” thing ! therefore the rest of the world just have to sit quietly and wait until Samsung decide to release, or not, the feature !!! https://www.smartthings.com/extend
See my “car buying analogy” on this post. That best summarises our situation!