I received a notification at 5:19 am today but I can’t find the notification now. Is there a way to find that message again ? Thank you KW

Open from Notification Center

The Notification Center shows your notifications history, allowing you to scroll back and see what you've missed. There are two ways to see your alerts from the Notification Center:

• From the Lock screen, swipe up from the middle of the screen.
• From any other screen, swipe down from the center of the top of your screen.
• To clear your notification history, touch and hold the X button  and tap Clear All Notifications. Or tap the X button  and tap Clear.

You may get better and prompt responses if you may kindly provide the iPhone Model that you have and the iOS version if it is known to you and re-post.