What if the ipad is locked and can't receive information?

Select the notification here to select the application that needs to be blocked from being displayed on the screen.

Go to settings on ipad. Select Notifications in Settings. Then select the application that needs to be prohibited from being displayed on the screen. Select the application, and then turn off the switch displayed on the lock screen. After closing, the app will not appear in the lock screen after receiving the information sent by others.