Astrolorp hen or rooster?

We rescued two 1 year old astrolorp chickens about 6 weeks ago. We were told they were both hens but one has not been laying. Is this a hen or a rooster? If a hen, any ideas on why she's not laying? She's on a high quality layer food.

https://preview.redd.it/kt54jtmou80f1.jpg?width=985&format=pjpg&auto=webp&s=8b2f029ca64bd6374e4f8f5eab27c5599f4806eb

https://preview.redd.it/kvu4x1yiu80f1.jpg?width=1381&format=pjpg&auto=webp&s=d36e6d3f78e04a0c116a2eb85c7d8ef5abebcec1