Many times we lost many of our phone's notifications. Sometimes, if these notifications are needed then you can search for files or folders. Sometimes, many people decide on data recovery. But we can easily get this notification back.
To get rid of the deleted notification again, go to the Widget menu by tapping anywhere on the home screen. From there, after selecting Settings Shortcut, tap the long way and place it on the home screen.
If you scroll down to the bottom of the settings shortcut, the notification log will be available where we can again see the missing nittyfixes.