Post iOS 27 update, iMessage and other apps are running very slow

I recently updated to iOS 27 on my iPhone 15 Pro. I have noticed a lot of delays in the apps' loading/running; the most egregious one is that it is taking ~45 min for photos to come through via iMessage. I still have 110GB of storage open on my phone. Any recommendations on how to speed up photos and other apps would be greatly appreciated.