Using Outlook for iOS for personal email and calendar management
@David Lapkovsky said
Email notifications are not working for emails routed to subfolders
I assume that means you are using Rules to move incoming mail to a folder? If so, I am sorry, but that is by design.
There is a very klugy workaround. See:
https://learn.microsoft.com/en-sg/answers/questions/4378261/mobile-notifications-missing-for-emails-moved-by-i