I know the vehicle data recorder, and I've heard that LTE radios have to report occupancy, though I can't find a requirement that cars need an LTE radio.
There's rumors cars will be mandated to support remote deactivation, but the story is unclear: https://www.usatoday.com/story/news/factcheck/2023/01/19/fac...
relevant: https://consumerwatchdog.org/sites/default/files/2019-07/KIL...