You Might Experience Some Lag
This issue is more common with older iPhones, but don’t be surprised to experience some lag with an iPhone 13 or newer.
First, this might not necessarily be an iOS 17 issue. If your iPhone runs well most of the time but only stutters with some apps, then it might be the app’s fault.
If it is your iPhone, then there are a lot of things that might be causing this issue, including low storage, a bug in iOS 17, or just the fact that your iPhone is a bit too old to handle iOS 17 properly.
Restarting your iPhone might fix this issue. If it doesn’t, you might want to wait for another software update or go above and beyond and reset your iPhone. Keep in mind, though, that this will delete everything that’s on your iPhone, so you might want to back up your data before trying it.