What are the breeds of parent birds? I have problems with abbreviations......
The head spot is present at hatch, but goes away as the birds feather in. As they feather, you should be looking for barring vs solid.
I agree the first bird looks female, but that second bird's comb looks classic male. Can we get a pic of that bird in profile?
Third bird looks male.
fourth bird isn't screaming cockerel, but without knowing the parents it's hard to say. Most of the crosses are sex links, so the bird should be male, but they do have some barred options also.