I don't have the Moto XPE, but this is how it works on my X Play. Swipe down lo unlock makes part of Moto Display and, as Ry said, I don't think to can change it, since swipe up is used to interact with the lock screen notifications. But if you press the power button you can 'skip' Moto Display and use the swipe up action to unlock/enter your lock method.