Hey, Kimem! Welcome Home! I'm going to agree with FlockMaster64 here. By 12+weeks of age, you should begin to see more comb and wattle development (or at least reddening) when compared to your other hens. Plus, I don't see any long hackle and saddle feathers in your pics, but you can probably see those better in person. I think breeds with smaller combs and wattles in general make determining gender in that way more challenging. In these cases I have to remind myself to consider the other characteristics that we can look for. In my most recent example, I got a couple of Pavlovskayas (a breed with small comb & wattles) in a rare breed assortment last spring and they developed more slowly that the birds I'm used to raising. So I kept thinking/hoping, "well, they could be hens" but finally, around 4months old, I noticed the lovely scarf of hackle feathers they were wearing. And you can see here, these guys still don't have any real sickle feathers to speak of, yet they're over 7months old!
So, I think you should take a closer look at your Americauna's feathers to see if you notice any differences there...but I think(& hope you will find that she's just a very tall, cheeky girl!
So, I think you should take a closer look at your Americauna's feathers to see if you notice any differences there...but I think(& hope you will find that she's just a very tall, cheeky girl!