Doesn't HDMI have built in Ethernet these days? So any HDMI cable of a certain specification is also a network cable.
I remember these things being discussed a while ago on here, how TVs use their own hard coded DNS ("for safety") rather than any network provided DNS (to avoid filtered DNS ala PiHole), how there's Ethernet in a HDMI cable, how other wireless networks are tried, and how eventually they'll go the car route and just embed a wireless modem in the device.
I am not aware of any smart TV that actively solicits a DHCP lease and default route outbound from anything it's plugged into by the 100M ethernet built into a current gen HDMI link. At least not yet. And since I think the default behavior for things like xboxes, playstations and apple TV is not to be a dhcp server and provide routing/NAT, I don't think a lot of things you can plug a TV into (also yet), would provide such function even if the TV tried.
I'm sure somebody at LG is hard at work on fixing this problem.
HDMI Ethernet was included in the spec 15 years ago and not a single consumer device (that I am aware of) ever implemented it.
Idk why this is so often citied in Smart TV boogeyman arguments.
Because it's there and available should they ever want to use it, and most people would not know that the HDMI cable is potentially another network cable.