After turning on the Wake screen when a notification is received when you receive a notification, the phone will remind you. The notification content is displayed in conjunction with the lock screen notification, and you can see the notification information for the first time.
Setting method:
relame UI 7.0: Settings > Notifications & Quick Settings > Wake screen when a notification is received.
realme UI 6.0 & 5.0 & 4.0 & 3.0: Settings > Notifications & Status Bar/ Notifications & Quick Settings> Lock Screen Notifications > Wake screen when a notification is received.
realme UI 2.0: Settings > Notifications & Status Bar > Manage notifications > More > Wake screen when a notification is received.
realme UI R & Go & S & T & U Edition: Not supported

Note:
The setting method for some realme UI 3.0 models:
Settings > Notifications & Status Bar > Manage notifications > More > Wake screen when a notification is received.