Night mode is an automatic setting which takes advantage of the new wide-angle camera that's in the iPhone 11 and 11 Pro models. It's equipped with a larger sensor that is able to let in more light, allowing for brighter photos when the light is low.
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New iPhone 11 and iPhone 11 Pro Models Ditch 3D Touch in Favor of Haptic Touch
Haptic Touch is also listed as one of the features on the technical specifications page for each device, which means the rumors were true - Apple has officially nixed 3D Touch in its newest iPhones.
Last year, the iPhone XR was introduced with a Haptic Touch feature that replaces 3D Touch, which has now expanded to the entire iPhone lineup.
Haptic Touch does many of the same things that 3D Touch does so new iPhone users will not be missing out on much functionality, but it's not quite the same as the 3D Touch feature.
Rather than a pressure sensitive pop, Haptic Touch is a long press that's similar to the long press on other devices like the iPad but paired with haptic feedback so you get a little electric response when you press.
3D Touch had multiple levels of responsiveness due to the pressure sensitivity, which is not available with Haptic Touch. This allowed for "peek" and "pop" gestures that did different things depending on the force of the touch.
Apple first introduced 3D Touch in the iPhone 6s and the iPhone 6s Plus, and it was used in the iPhone 7, iPhone 8, iPhone X and iPhone XS models before being discontinued.