I had an old LG TV, I played around with MITMing it by telling my DNServer to return my NAS's IP for *.lg.com, etc servers, and I was recording the HTTP requests it was making (this was last decade and I guess lack of HTTPS wasn't shameful yet). I got rid of this TV, but never fixed the DNS settings, and it seems my new LG TV has never been able to phone home to show me the EULA to accept.. in return I do get a more limited experience, but I can switch inputs just fine.
So TL;DR: it's probably possible to configure Pi-Hole (or dnsmasq) to block the ads/phone-home behavior of the TV.
So TL;DR: it's probably possible to configure Pi-Hole (or dnsmasq) to block the ads/phone-home behavior of the TV.