My first two Model 3’s did not have any window stickers. It never occurred to me that they should so I didn’t give it much thought.
On my third Model 3 delivery I finally remembered to ask for the window sticker. The guy looked at me like I was from another planet but did proceed to go to the back office and print out the sticker for me. I walked around the Costa Mesa showroom which had at least ten cars ready for delivery and not a single one had a sticker anywhere in sight. I get the impression that Tesla doesn’t believe the Monroney law really applies to them. Maybe they think they are really selling a giant computer on wheels and not an actual car.