Originally Posted by
gustavmahler
Just to add, AA sectors booked through BA on a 125 ticket will show up. Strangely, though the seat selection has not updated on myflights for one AA sector on an upcoming booking. This is not something I've had before.
Presumably that is because BA will have created the primary PNR when selling the ticket, so that would be in Amadeus and be accessible by myflights. But if the seat change on an AA sector isn't driven back into the primary Amadeus PNR (which IME can happen if you do that directly with the operating airline) then myflights won't see the change.