I changed the WiFi password as never told my Samsung the new one. I expect this will work for a year or two until they figure out how to force their way onto the network.
Amazon sidewalk and related technologies will likely allow devices to bypass needing your network at all in the future. The last TV that doesnt support these features will probably be my last.
There's a wonderful thing that we used to have and still do have, but might be going away soon. It's called "terrestrial television". For decades people streamed programming over the airwaves, straight off the antenna! For free! Ad-supported of course, but... no tracking! (Actually opt-in tracking with a Nielsen People Meter.)