The Apple iPhone XR does not offer users the opportunity to use 3D Touch. To replace 3D Touch, Apple added Haptic Touch to its lower priced 2018 handset. This feature allows users to long-press the screen and feel Haptic Feedback to turn on a new feature. As 9to5 Mac points out, holding down the spacebar with a long-press will turn the QWERTY keyboard on the iPhone XR into a trackpad.
This is available to iPhone XR users once the iOS 12.1.1 beta is installed by those registered with Apple as a beta tester for iOS. If everything goes well for Apple, all iPhone XR users receiving iOS 12.1.1 will see this in the final version of the software, expected to be launched before the end of the year. There is no difference how these expanded notifications look on the iPhone XS, iPhone XS Max and iPhone XR. Since the first two units use 3D Touch, the expanded notifications will pop up quickly on those models as the devices figure out whether the user is pressing harder on the screen. Those with iPhone XR will have to wait for the screen to determine if they are pressing longer than normal to expand the notifications. Either way, the difference will be measured in seconds, and the results will be the same.