Here are 6 Barnyard Mix babies from my flock and I’m looking for opinions on sex. I know the White NN and the Black fluffy cheeked (two from right) one are both boys.
I see 3 boys, 2 pullets, and 1 unsure. Your top picture from the left 1, and 3 look like pullets, and 2, 4, and 6 look like roosters with 5 leaning that way.
The black with silver NN is definitely a cockerel. The blue NN is definitely female. The frizzle is probably female, since there is no silver or red leakage at all. The crested blue is also definitely female.