Why I'm not able to login my outlook account in mail app in iPhone

Any idea how I fix my phone I'm clueless! Personal GMail isn't downloading, app store won't load keeps saying retry - can't access my banking app. Everything just keeps trying to load then doesn't or freezes or won't open at all. Unable to restore deleted apps as I can't even get in the app store. iphone 14 with new upgrade last night to 18.3.1 - now nothing works.

I have several people who lost connection on the iPhone mail app on Saturday and are not able to connect today.
The only thing that works is installing Outlook instead of using the native ios mail app.

not that I can see, but I got that from a Microsoft service health posting, not apple

Is there any information about not being able to connect to App Store? I updated to 18.3.1 last night and I'm not getting mail, can't access any apps - when I go to them they are super slow...and when I uninstalled them, I can't open the App store to put them back on my phone. I'm so frustrated.

There is a known issue they are working on today - Issue ID EX1021490

Users may be experiencing issues with accessing email messages on the iOS native mail app

Users may be able to click "continue" when prompted and navigate back to re-entering their password to attempt to resolve impact. Additionally, some users may be able to bypass the prompt to sign-in by clicking "edit settings" and then entering into the app

Any user serviced by the affected infrastructure may experience issues with accessing email messages on the iOS native mail app.

10:44am PT

Our analysis of the diagnostics logs has identified authentication failures, which we're continuing to investigate so that we can isolate the source of the impact.

11:47am PT

Our investigation into the authentication failures has so far revealed that there is an issue with the authentication tokens being sent from the iOS native mail app. We're continuing to investigate and determine the next steps to troubleshoot the issue.

Next update expected by 2pm