Riche Bronson
Songster
Definitely a pullet- and according to my monitor, she has coloring that’s consistent with a brown leghorn (as does the one behind her in the first pic) but the (lack of) comb and wattles aren’t right. So I would agree that she’s a mix of some sort. Also, looks thin and tall, but she could fill out depending on her age. Pretty bird though! Check out this link- another poster with a brown combless/wattleless leghorn- and it looks pretty close to me!
https://www.backyardchickens.com/threads/leghorn-roo-or-pullet.785816/
https://www.backyardchickens.com/threads/leghorn-roo-or-pullet.785816/