Message notifications not working since iOS17 without banners

Hello Appleuser8901,  

Welcome to the Apple Support Communities.  

Please start with these instructions to be sure your notifications and alert settings are enabled as you would expect:

• Change notification settings on iPhone - Apple Support
• Change iPhone sounds and vibrations - Apple Support

It will also help to install any system and App Store updates. Please also check your notifications again after restarting your iPhone:

• How to manually update apps on your Apple device.
• Update your iPhone or iPad.
• Restart your iPhone.

Please reply back if you need more help. You can also contact Apple Support directly for assistance: Apple Support.

Cheers!

Greetings Appleuser8901,

Since we're unsure if this is a new feature or not, we recommend reaching out to Apple Support. They'll be in the best position to investigate this issue further with you. You should be able to reach them using this link: Get Support

All the best.