The iPhone XR doesn't have a pressure-sensitive screen, which makes it lack 3D Touch. So Apple introduced a way to replace 3D Touch to a certain extent, which is Haptic Touch, which combines iOS with iOS. Long press operation to simulate 3D Touch, such as long press the space bar on the keyboard to call out the touchpad mode, and long press the flashlight on the lock screen to open the flash.
However, since the iPhone XR's software update has been released, the iPhone XR's tactile feedback function is still limited, and the notification center's notifications cannot be extended, and the richer notification content cannot be viewed. The 3D Touch functions like Peek and Pop are not very good. May be suitable for iPhone XR because they rely on different levels of stress.
In the latest iOS 12.1.1 Beta 2, the haptic feedback feature seems to have expanded. On iPhone XR, iOS 12.1.1 Beta replaces long presses, just long press the notification banner to see more content, which requires the user to swipe left and then click View. The difference between haptic feedback and 3D Touch is response time, 3D Touch gestures can be done immediately, and tactile feedback requires a long press.