Expert Flyer does provide alerts for AA awards on AA metal, and on some other OW carriers too. However, AA is opening up much less award capacity than in the past and my last 20 or so EF alerts never resulted in an opening, even though set long before the flight dates.
Poster was perhaps confused by UA for which EF can no longer provide alerts or other award info, or maybe OW itineraries that include any US Air flights, which EF also can not access and provide to its customers, at least for now.