Hello fiddlestix1234,
Welcome to Apple Support Communities!
It sounds like he has the Do Not Disturb feature enabled since he's seeing that notification.
He can verify his settings are correct with these steps:
"Change your Do Not Disturb settings
If you don't want to be disturbed at a certain time, you can set a schedule and change other Do Not Disturb features to help you concentrate.
- Go to Settings > Focus.
- Tap Do Not Disturb.
- You can select allowed or silenced notifications from people and apps, connect your Lock Screen or Home Screen, have this Focus turn on automatically, and add Focus filters."
This Apple Support page has the full details: Use Do Not Disturb with Focus on your iPhone or iPad - Apple Support
We hope this helps quickly isolate and resolve the issue with the notifications being silenced.
Cheers!