I bought my 2014 four+ years after it was new and it came with the plastic license plate bracket though it wasn't installed. I had the plastic bracket but no screws (or so I thought) in the frunk. I took it to the local BMW dealer to see about getting the screws to install it on the bumper. They (of course) couldn't find a part# listed in their system for that and eventually sent a kid out to look at my car and he ended up grabbing some screws from behind a counter and installing the bracket in 5 minutes (after I pointed out he needed to flip it right-side-up).
Ironically, I later found there was a packet of screws in the "tire repair" kit styrofoam in the frunk, and after that my state changed their law and front-license plates will no longer be required.