Some do this (Samsung), but the more common tactic is to throw constant nags up if the telemetry is not being sent to the manufacturer.

I did my research and bought one that does not do this (2025 TCL), but, if it turned out that it did, I'd have shamelessly returned it. I'd also have issued a chargeback if the store gave me any crap.

Even with all that, if you install firmware updates over the network, then disconnect WiFi, the TV becomes unusable until you factory reset it. (I did this because its EDID is corrupted, and I have to override it with a linux cmdline. The update did not help.)