Not sure on gender but I am 101% sure that those are not Red Sex Links, RSL have a single comb and are a large brown egg layer, the hens have red outer feathers and white down, roosters are mostly white. I don't have many pictures of RSL but here are 2.
the one standing in front is a RSL, so is the one behind it on the other side of the water.
One to the far left is a RSL, they have a similar build to a RIR, the birds to the right.

the one standing in front is a RSL, so is the one behind it on the other side of the water.

One to the far left is a RSL, they have a similar build to a RIR, the birds to the right.