Although the book was written for XCode 11.4, I’m using XCode 12.1, and they’ve already removed the iPhone 11 Pro Storyboard view which the text asks you to set it to (pg. 9). There are only iPhone 11 and iPhone 11 Pro Max, along with the new iPhone 12 views.
You can still set to build to the iPhone 11 Pro, but you can’t view a storyboard simulation for it.
I hadn’t noticed that. I guess the reason why is pretty soon you’ll get into Auto Layout and only care about relative values for the positions of everything anyway, as it should be.
My iPhone XR isn’t in there, either. It’s been a while since I looked at those choices.