LG TVs may be rooted. You probably can also run a pi-hole sort of thing to block any traffic except whitelisted domains.
Not that I've done it, I don't get enough value out of it to justify the hassle or the privacy intrusion.
The thing stopped being so needy when I neutered its internet access. Maybe it’s still exfiltrating data but at least it has stopped making me anxious that I may need to consult a civil rights lawyer every time I saw their EULA.
According to Root My TV, it seems like all methods of rooting recent LG TVs have been patched.
[1] https://rootmy.tv/