That is the CARB certification for the cabin air filter. CARB sets many standards -- some for vehicle emissions, and some for air cleaning. Weird, yeah?
https://ww2.arb.ca.gov/list-carb-certified-air-cleaning-devices
I agree that this is strange and mystifying. Obviously they want to deliver vehicles! Obviously they are able to build things that look like finished vehicles in bulk! People in the forum have VINs that show charged and updated vehicles! The showroom vehicles don't even really need to be operationally complete, although there's probably not much point in displaying showroom vehicles and generating more demand for something you can't deliver yet.
Options are:
- hardware part is unavailable
- hardware part has shown a defect in the limited units in the field
- software is not ready yet in a dangerous or ugly way (unlikely, since you have one)
- missing certification / homologation / etc
- aliens
We know there are vehicles in motion to showrooms, both for demos and delivery. I suspect we'll learn more soon. Go do something relaxing, pick up a new hobby, or play with your pets or kids. You'll get your car eventually.