Iphone No Notifications When Locked. To turn your iphone off, press and hold the power button until “slide to power off” appears on the display. Swipe left over a notification to manage alerts for that app, or clear the notification.

If you are not getting iphone notification from another iphone, ipad, with your apple watch, from an android phone, try the following methods to solve it. If ios 12/13/14/15 does not show notifications, you can try to fix it by resetting network settings. To fix this, you can go to:
Iphone Notifications Disappear From Lock Screen, How To Fix?
Settings >> notifications >> tap show previews option. At the top of the new menu, tap the show previews tab. Enable “show on lock screen” setting to solve iphone notifications not working when locked go to settings > notifications.
Ensure Allow Notifications Is Green.
There’s no point in using the battery on both the devices for the same notification so this is a more efficient implementation of the notification system in apple devices. No way to uncheck this. Then, swipe the power icon from left to right to shut down your iphone.
If You Do Not See The Actual Message Content On Iphone Lock Screen, Tap Show Previews And Choose Always.
Next, check the boxes for lock screen, notification center, and banners. You can find the same under settings >. Show on lock screen setting:
Swipe Down On Your Iphone’s Lock Screen To Pull Up A List Of Notifications.
After a minute, switch on your iphone and ask a family member or friend to call you. This is on iphone 11. To turn your iphone off, press and hold the power button until “slide to power off” appears on the display.
To Restart Your Iphone Use The Buttons Like You Usually Do.
In apple's support forums, one person discovered that turning on and off the announce notifications feature could possibly fix your phone's notifications. Turn on background app refresh for mail in your iphone settings: If there are no notifications to pull up, you’ll see no older notifications appear instead.