Notifications help you keep track of what’s new—they let you know if you missed a call, if the date of an event moved, and more. You can customize your notification settings so you see only what’s important to you.
Unless you have notifications silenced with a > Notifications > Scheduled Summary, then turn on Scheduled Summary.
Set a time for your summary to appear. If you want to receive another summary, tap Add Summary.
Select the apps to include in your summary.
Tap A to Z below Apps in Summary, then make sure the apps you want to include in your summary are turned on.
Note: If an app you want to include in your notification summary doesn’t appear in the A to Z list, you may need to turn on Allow Notifications for the app. Go to Settings > Notifications, tap the app, then turn on Allow Notifications. See Change notification settings on iPhone