iOS keyboard cursor now works on all devices running iOS 12

One of the iPhone’s most useful 3D Touch features is the ability to turn your keyboard into a trackpad while typing, and with iOS 12, this functionality is coming to handsets without Apple’s pressure-sensitive technology. Mashable notes that you can enable the functionality by long-pressing the keyboard’s space bar at any time, at which point you can use it to easily move your cursor without having to obscure the text with your finger.
Apple introduced 3D Touch with the iPhone