Worse, if you watch the GN video this article is based on you'll find the TV can figure out how to leverage other non obvious networks (threads, etc) to reach LG servers. Worth a watch to see how bad this is: https://www.youtube.com/watch?v=6IFVTcM28KA
I'd just block them - and keep local streaming and remote control working
edit: just found out WebOS doesn't support DoH/DoT so nextdns won't work.
I wonder if one of the public dns providers got LG blocklisted natively with specific IP