alt Hacker NewsLG's terms of service essentially state that they will record any voice commands and store them for 6 months. They explicitly say they may store them in Korea. https://us.lgappstv.com/main/terms
Actually I think everything you're suggesting is unclear, LG explicitly say they do these things in their ToS. I skimmed their privacy policy, and I'm pretty sure it essentially says they collect all this information and use it for targeted advertising.
Yeah, and here's the part that's interesting to me as a EU-consumer: This wording doesn't exist in the European ToS: https://gb.lgappstv.com/main/terms#tabContentTerms6
So there's the angle that US is lacking the proper regulation, and the angle that LG may have violated its ToS in the EU.
But neither of this is going to get pinned down if everything is bunched together without focus and clear evidence...