It is possible that the voting was real...
Bandas name and profile was first up as the nominees were listed alphbetically, this does play a part... click on the first one.
Also, on the face of it, without knowledge of chromosomes, Banda is an amazing player, hat trick in the olympics, powerful international player, coming from a minor footballing nation.. it is a great story. Just one that is missing some crucial facts. There may also be an element of backlash from the false narrative that any critism of Banda lies in racism, gender stereotypes, transphobia... and therefore deserves a vote.
It may also be subconscious voting by males for males.
It is shocking that NWSL, FIFA and the IOC have all played a part in welcoming this male player into female football. It is also shocking that journalists, officials, coaches etc remain silent. There is no one around that player, in the sport, in the world of journalism that believes Banda is XX.
They may believe that the world should move on from gender binary and that they need to move with the times, that to speak would be to side with Trump or the hard right, they may be willfully ignoring the reasons for the existance of the female category, they may be going against their own instincts, they may fear backlash, they may be protecting their careers but they do not believe Banda is XX.