also, as a side note, by doing this, you can opt out of the user agreement, and disconnect the LG from the internet (I block mine in my router). When you agree, you give them permission to analyze the video signal and report back what you're watching. Even if it's coming from an external device over HDMI like a cable box or aTV, the AI in the set determines what you're watching and sends that info back to LG, and possibly their partners, depending on what you have enabled.
if you haven't agreed to the terms, I think native homekit is disabled. All apps definitely are.