Turn off Focus Inbox on Outlook mobile app

Focused Inbox separates your inbox into two tabs—Focused and Other. Your most important email messages are on the Focused tab while the rest remain easily accessible—but out of the way—on the Other tab.

If you would like to turn this feature off:

Open the Outlook app on your Phone
Tap on your profile picture or initial in the top left corner of the screen.
Scroll down and tap on Settings.
Tap on Notifications.
Scroll down to Focus Inbox and toggle it off.