https://www.bleepingcomputer.com/news/microsoft/outlook-app-to-get-built-in-microsoft-365-mfa-on-android-ios/

Microsoft will soon fast-track multi-factor authentication (MFA) adoption for its Microsoft 365 cloud productivity platform by adding MFA capabilities to the Outlook email client.

The company says in a new Microsoft 365 roadmap entry that users will be able to complete MFA requests for Microsoft 365 apps directly in the Outlook app via a new feature dubbed Authenticator Lite.