It is possible that Elegoo somehow crippled their Klipper version, but since they also seem to be violating the Klipper GPL license by not publishing their changes, this will be hard to verify.
Whether you can run a pristine Klipper on this printer is equally unknown. See 3D Printers with Preinstalled and Modified Klipper Versions for some information on this topic.
Generally, I would think it is a slicer setting thing.