Did you swipe up on the lock screen or home screen or within apps? Try these solutions:
1. enable access to Control Center on the lock screen and in apps: Settings > Control Center > Turn on "Access on Lock Screen" and "Access Within Apps". If they've been already on before, just turn them off and then back on.
2. If you were using Messages app or other apps with the keyboard, try to swipe up from the edge of the screen, not from the center.
3. Go to Settings> General > Accessibility> Turn "Zoom" off.
4. Also try a restart after any of the above operations.
Hope it works. 🙂