[Yeri]

That’s Alexa hardware using something like LORAWAN or zigbee or something. Bandwidth is low.

I doubt that (at this stage) TVs have something similar builtin. When they come with Alexa/GHome/... it’s usually the software and not an actual Alexa device built in.

[wasmitnetzen]

Amazon just announced Sidewalk, where their Echo/Ring devices share their internet connection. If it's not happening yet, it will be soon.