This article describes how to disable or move items from the Focused Inbox.
In Outlook select the View tab at the top and click the Show Focused Inbox icon to turn off the focused option. If the Show Focused Inbox icon is highlighted in grey it is turned on if it is not highlighted it is turned off.
If you are using the Microsoft 365 Outlook WebApp click on the Settings icon and turn the slider blue to turn on Focused or white to turn off Focused.
If you are using the Focused Inbox and items are going to Other that you would prefer to go to the Focused, right click on the email in question and select Move to Focused or Always Move to Focused if you wish for emails from that sender to always go to the Focused Inbox.