Native iOS app is broken with iOS 18.5 update but here are some fixes you can try

The iOS Native Mail app has been having issues since June 4th. | Image credit-PhoneArena
Apple Support had another suggestion and recommended a forced restart of the phone. To do that, quickly press the volume up button, the volume down button, then hold the power button until the Apple logo reappears. Another Apple Support employee suggested that users reset their Network Settings by doing the following once the Settings app has been opened:
- Tap General
- Tap Transfer or Reset
- Tap Reset
- Tap Reset Network Settings
If none of these workarounds fix the issue, others claim to have been successful by uninstalling the Mail app and then re-installing it. Hopefully, Apple will disseminate iOS 18.5.1 to fix this and some other bugs affecting iPhone users running iOS 18.5.