I have an LG C2 OLED and had it connected to the internet.

It spams me with in-screen notifications at least once a week with either Privacy Policy updates or advertising new apps or TV shows.

Great TV but definitely need to leave it unconnected.

If you use nextdns or pihole you can block those. I do so the home screen has no top 2/3 of TV suggestions, just my installed apps at the bottom and the hi Def paintings from the gallery app showing above them.

Eventually these devices will use DoH (DNS over HTTPS) to evade local ad and tracker blocking.

My LG did that then I just blocked it on the wifi router