I recently got a Samsung TV, The Frame 55 inch to be more precise.
I already had my Nest account connected to SmartThings on my Galaxy S20. And I can view the live stream of my Nest Hello and Nest Cam.
However on The Frame I can view my live stream of the Nest Cam, but not from the Nest Hello. I am running all the latest updates etc. I also disabled and enabled again the permissions for the Nest Hello in connected devices in SmartThings.