Is your Outlook not working on iPhone and you don’t know how to fix the issue on your part? Then in such a situation, troubleshooting is very necessary. But first, it is important to identify the causes and then perform some fixture.
Check the POP & SMTP Settings on your iPhone
Make sure there is adequate internet speed
Update the settings on iPhone and set them properly
If this does not fix the problem and Outlook still does not seem to be working then you can directly reach out for availing technical help.