This forum was set up a number of years ago so that customers can help other customers. It’s not officially monitored by smartthings except they occasionally post announcements here.
To get the attention of Samsung smartthings, it’s usually most effective to reply to their official Twitter or Facebook pages. At least marketing monitors those.
As far as watches, I assume by “iwatch“ you mean the “Apple Watch“ from Apple? IWatch is actually a different device from a different company who owns a trademark on it and Apple decided “Apple Watch“ would work better for them anyway. 
if you’re already paying the IFTTT subscription you can use Ifttt for a watch app. If you’re not paying the Ifttt subscription I don’t know if it’s worth it, you can set up a free account with three applets, but that’s not many.
The other alternative if you have a strong technical background is to set up homebridge and then access through HomeKit. That works fine, it’s just a lot of work to set up and you need an additional server device like a raspberry pi. You can talk to people doing that in the following thread: