Fortunately, you can specify your own DNS to point at a black hole proxy like: https://pi-hole.net
Though blocking is a little harder if you want to use built-in apps of the TV (i.e. Netflix) while blocking it from sending viewing data to Samsung or its affiliates.
Though if you really want to keep the TV from spying on you, the easiest thing to do is to just not connect it to the internet (which is still an option in these pre-5G days, not sure that will always be the case in the future, the TV may have a built-in 5G modem that it can use to talk back to the manufacturer)
I would hear that all the time when I was a kid. I don't think I've heard it in public in decades. Or maybe I was just a nosy kid.
Pi-hole would be able to implement a DoH server, providing similar functionality as today.
Pi-hole like solutions are not working when DNS requests are made from the application, ignoring local resolvers configuration.