2.5yr old sleep regression. Help!

Has anyone dealt with a 2.5yr old having sleep regression? I am at my wits end here.

Yes there was a life change just a couple weeks ago with changing daycares (didn’t want to but had to due to school district purposes), and I know that is the cause of it. Plus my 5.5yr old starting kindergarten and being gone all day long now.

What have you all done to help a toddler get through it. I have a strict bedtime routine for both my girls. Bedtime is 7:30. She is regressing on naps (shorter time or no nap at all) and hard to get to sleep at night (takes 1-1.5hrs). She is a complete little bear, and overtired.