Plenty of new 3D printers have a camera to let you monitor your print as it is being finished. For older 3D printers, you can use the Mintion Beagle 3D printing camera. It combines with your phone to let you monitor your prints from your phone. It can also be used to create timelapses of your prints.
This camera is compatible with Creality and many other 3D printers with Marlin firmware machines.