Lock Screen iOS 15

Open from the Lock screen & Notifications iOS 15
You can quickly view your recent notifications from the Lock screen by turn on your phone.

You can also do these things from the Lock Screen & Notificaions iOS 15
Tap a single notification or a group of notifications to view all of them for that app.
Swipe left over notifications to manage, view, or clear the notifications.
Manage alerts for specific apps.