Totally unrelated.Turn off animations. It's the first setting I toggle off when setting up a phone.
My wife’s XR isn’t lagging in any way (TBH even my son’s SE isn’t really lagging), so it must be something else.Yeah that's what I thought first but before doing anything I wanted to know if there was something to fix it besides a restore. I hate to restore my phone. Specially with my photos.
This could be it.It's probably an app running amok in the background. Check battery and cellular data to see if any apps are using a surprising amount of either. We have an iPhone X and an iPhone XS in our family that are both running iOS 13 just fine. So is a 9.7 inch iPad Pro.