Apple iPhone 11 Pro Max

Press Settings.

Press Notifications.

Press Show Previews.

To select notification preview on the lock screen, press Always.

To select notification preview only when your phone is unlocked, press When Unlocked.

To turn off notification preview, press Never.

Press arrow left.

Press the required application.

Press the indicator next to "Allow Notifications" to turn push notifications for the selected application on or off.

Press Notification Grouping.

Press the required setting.

Press arrow left.

Slide your finger upwards starting from the bottom of the screen to return to the home screen.

Slide your finger downwards starting from the top of the screen.

Press the required push notification and follow the instructions on the screen to use the selected function.

Slide your finger upwards starting from the bottom of the screen to return to the home screen.