24 month old daughter went from sleeping her nights. last couple weeks she has started to whine and cry multiple times throughout the night but doesn't appear to be awake. if this normal development or should i make peds apt ?

This is not about development. If this is in her sleep it is possible she is having pain. Does she have like cold that may predispose to ear infection? If she is totally actively normal during the day it may be something in her dreams and that may result in normal finding on examination.

This can indeed be a behavioral issue. Of course ensure your child is not sick. Sleep regression is common for toddlers. There are many sleep training techniques to allow less frequent night awakenings. Look up extinction or Ferber methods to start.