Thanks for the response. I called AA last night and the agent confirmed that reward seats availability matched the one from Award/CX. But getting the agent to call CX seems very challenge because not everyone knows who to call.
By the way, does anyone know what make a flight to release the seats for reward seating? I have been tracking the F seat map to see if there is a pattern. It looks like when there are more than 5 empty seats out of 9 seats in the F, that flight will release the seats for reward. But this is not always the case.
And why A4 and K4 seats are always not available in F? Even if I look at dates an year ahead.