I agree with
@chscag, although I doubt that they are still manufacturing iPhone 11's. Whatever is still available is surely left over stock since that model is now 2 years old.
Or are they (still producing that model)?
AT&T still shows even the iPhone Xs and Xs Max as available, though. At full retail price! As well as all of the iPhone 11, 12 and now 13 models. Some are discounted, some are not.