Iphone message notification not working

- Iphone message notification not working when phone is locked
- Iphone message notification not working for one person
- Iphone message notification sound not working
- Iphone text message notification not working
- Iphone 14 message notification not working
- Iphone 13 message notification not working
- Iphone 12 message notification not working
- Iphone se message notification not working
- Iphone voice message notification not working
- Iphone 6s message notification not working
- Iphone 8 message notification not working
- Iphone 15 message notification not working
- Iphone 12 text message notification not working
- Iphone 12 pro message notification not working
- Iphone 11 text message notification not working