Keep in mind that the tv already has ethernet and wifi to ISP controlled networks. Basically almost every consumer ISP offer mandatory includes an ISP managed gateway, that can pre-certify your appliances or operate hidden ssid networks or "public" wifi access point to the ISP's network. So "smart" appliance operators only need deals with a few big ISPs to get this reach, no 5G required.
With less than a dozens deals you would cover most of the US and EU.