It's a pullet - I don't see any roo signs at all on this chicken - small comb/wattles, curved feathers.
My 2 BA cockerels were also easily identified as boys by about a month old.
This one here is about 7-8 weeks old - obviously boy:
This is my pullet at 12 weeks old - had me wondering because of the large wattles, but she's laying now:
If you click here, you'll see another pic of an 8 week old BA roo and pics of my pullet at ages 11, 12 15, & 23 weeks of age.
https://www.backyardchickens.com/forum/viewtopic.php?id=239635
My 2 BA cockerels were also easily identified as boys by about a month old.
This one here is about 7-8 weeks old - obviously boy:

This is my pullet at 12 weeks old - had me wondering because of the large wattles, but she's laying now:

If you click here, you'll see another pic of an 8 week old BA roo and pics of my pullet at ages 11, 12 15, & 23 weeks of age.
https://www.backyardchickens.com/forum/viewtopic.php?id=239635