Yes with auto sexing on hatching you can identify the males from the females.Much depends on the strain/line of the breed. As Bellecross Belles are a Welsummer cross identifying the chicks is the same as for Welsummer chicks - the females chicks should have a very noticeable eyeline.
If you look at the photo of the hen with chicks above,withe the group of three chicks at the left back of the photo, the centre chick is male ( lacking in eyeliner) the chick either side of it is female ( dark eyeliner)