Maybe, or it could be that she's just fat as fuck and the arms look out of proportion because she has that caved-in FTM chest. Even a fat man of her size would have some pretty plump moobs, but her chest is weirdly flat which makes the arms look bigger by comparison. A guy with muscle under fat would also have more chest volume, but hers has literally 0 definition, it's just flat up and down. Only ultra skinny guys have totally flat, flush chests, and she is obciously not ultra skinny.
I think these are supposed to be progress pics? The hair is different and she has a slight tan in the second. No idea what progress it's supposed to be, though- she looks jast as fat in the second one, if not a little fatter. Her upper body lookes maybe a little fuller, but It looks to me like she's just lifting and twisting the shoudler facing the mirror a bit, thus tensing the muscles and making them bulgfe a bit more. Either way, looks weird.