Using Outlook for iOS in business environments for email and scheduling
Hello AlexMSFTac,
Thank you for posting this to the Community Forum. I hope you're doing good today despite having an issue with your email stuck as draft in your Outlook email for iOS. Let's try to get to the bottom of this concern.
Uninstalling and reinstalling the app should have fixed the concern because all the settings will go back to default and you will have a fresh and and updated copy of the app. However, you said you're still having the issue, so this concern needs extensive troubleshooting and to extend our assistance, we strongly recommend contacting the Outlook in-app support for iOS and Android. You can click on this link.
If you have other concerns, let us know.
Bob