In the Home app, it tells me that "full remote is not available. Check
device for latest update". But both my Samsung 4K TV and the CCGTV have
newest softwate updates. In case it matters, I use the Google ethernet
adapter power brick.
addendum: the "now playing" part of the Home app Does work, so I can see
what's playing, change the volume, fast fwd/rev, pause, play. But
without the full remote functionality there is no D-pad, etc.