Yep, Peter, you are one of many non-US users who is trying to use a “US only” feature…
bad luck!
Last month, I also bought, in the UK, a 2016 KS TV on the basis that I could connect it to my hub…
Nowhere on the UK advertising, specification, Samsung UK website, etc it is written that this is a “US Only” feature!
I have been conned by Samsung and I discovered it the hard way!!!
Welcome to the “second class” Smartthing users group!
See my “buying a Samsung car” analogy, which illustrates our situation!