iCloud in Outlook for iOS/iPadOS

I use Outlook on my Mac, iPad and iPhone.  I have the latest macOS, iOS, iPadOS and Outlook for Mac and Outlook for my two devices.

My iCloud account works as expected on my Mac(s).  It doesn’t on my “i” devices.  My email shows and after it is read, disappears.  It is not being deleted, because I still see it on my man and iCloud.com

When I set my iCloud account there was a way to connect the account directly to iCloud. I don’t see a way to do this on my “i” devices.  Is there a way to do this?

Thanks.

Len Levin