After many years of Outlook use, I had to uninstall it.
Today (May 6, 2024), I suddenly got banner ads appear at the top of my screen. Occupying a whole bothersome row.
I do not feel pleased to see ads appear in my mailbox. It feels very intrusive, forceful and unprofessional for a company like Microsoft.
I opted for Apple Mail. It's the default for iOS and doesn't have these ridiculous ads.
It also doesn't require an app-specific password for iCloud email domains, which is a nice bonus. Because if you change your iCloud password then you also have to regenerate your app-specific password in your iCloud account and then set it up again in your favorite mailing app. Except for Mail from Apple.
I wish Outlook would stop these ridiculous ads in people their mail box. And if you do it, at least don't do it on a phone. The screen is already small as is!