Technically, a person who has filed a proper I-485 is in a period of "authorized stay". However, "authorized stay" is not a legal status, in itself. It means the person is not accruing unlawful presence. That person could be "out of status", but in authorized stay.
Differences Between: Lawful Status, Period of Authorized Stay, & Unlawful Presence - Murthy Law Firm | U.S Immigration Law