No integration between Kuna and SmartThings at the present time. Many of us still added Kuna to our set ups in 2015 because it was a nice choice for the front door camera if you could also use the light. In particular, at that time it was very easy to just review the current feed without needing it to have been triggered by the motion sensor like some of the other doorbell cameras.
I still have mine and like it as a video doorbell, but it probably isn’t what I would select today as there are so many more camera options now available. 