Does the TV show up as a device you can authorize in SharpTools? If so, can you share a copy of the device details:
- Navigate to your User Page
- Tap the
...next to your desired location - Tap the desired device
- Take a screenshot of the page and paste it here
(Alternatively, since you’re a SharpTools for Android user, you can go to Settings → Support → Send Things in the Android app to send a copy of your things to the support email address)
I vaguely recall that some of the new Samsung TVs were being integrated as part of the ‘new’ Samsung SmartThings app, but were not accessible from the SmartThings Classic app. Have you tried the SmartThings Classic app and can you control the TV from there?