I don't think that's an Ancona. my thought is mottled Java.
They're slower to mature. She's definitely a hen, but her comb doesn't look quite mature enough to lay. I think she's just a big girl and taking her time.
Plus, she'll be a brown egg layer. If you're looking for white eggs, you're going to miss them. Possible she's already laying, just brown eggs? You might try confining her for a few days and see what you get.
They're slower to mature. She's definitely a hen, but her comb doesn't look quite mature enough to lay. I think she's just a big girl and taking her time.
Plus, she'll be a brown egg layer. If you're looking for white eggs, you're going to miss them. Possible she's already laying, just brown eggs? You might try confining her for a few days and see what you get.