They could (although I’m not sure of the 80Kbps that Amazon sidewalk allows is really sufficient for the purpose of uploading ACR data), but is there any evidence that any TV manufacturer actually is? The reality is, why would they bother? 95% percent of people that buy a “Smart TV” hook it right up to their WiFi as soon as they take it out of the box.
80Kbps is enough, after all they don't want to accidentally ddos their server.
ACR isn't generally a lossless 4K snap shot but indexed 32x32 pixel blocks from arbitrary locations on screen. In some cases it's even a fuzzy hash of the content source, and while 80Kbps isn't a lot, you can still push out data in a timely manner.