Give FB a call - they'll be able to advise and look up for AZ availability. Incidentally, I've been looking to spend some FB miles recently and searched for MXP-NRT (AZ direct flights) but the only services shown were mostly AF/KL-plated. Looking at a MXP-JFK-MXP for random dates in April, most solutions are via CDG/AMS and even MAD, same with FCO as starting point. The availability seems to be showing correctly, though, on flights within Europe (I recently booked some WAW-FCO-WAW flights for Mrs+family and was able to do so on the AF website, where the AZ direct flight was coming up at first).
G