Unread email number not showing on Mail icon.

There’s a new feature apparently that shows all unread or just unread primary messages. Mine was set to primary somehow when I updated to 18.x. Once I set it back to all I see all unread now.

Settings->Notifications->Mail->Customize Notifications

Hey there,

It sounds like you’ve already done some great preliminary troubleshooting, let’s continue, What is the iOS 18.x version on your iPhone?

Have you checked your customized notifications in the mail section in the settings?

If not go to settings > mail > customized notifications , and then make sure that all of your accounts have the badges on like the picture :

Click on settings

click on Focus

do not disturb

click on options

uncheck —> Hide notifications badges

to get #of unread emails and messages to Display, swipe down to get the control center to come up.

To adjust your iPhone's Do Not Disturb settings, you can use the Control Center or go to the Settings app. 

Control Center 

1. Open the Control Center 
2. Tap the Do Not Disturb icon, which looks like a crescent moon 
3. click settings
4. Click on OPTION s ,
5. Hide notifications Badges. UNCHECK!!!!

Update your iPhone to see if it will fix this bug ☞ Update your iPhone or iPad - Apple Support.

In this situation we recommend you to contact Apple support for further help ☞ Contact Apple for support and service - Apple Support

All The Best (•‿•)