Yeah it’s alone in the tank so it’s tough to tell sometimes has the colouration of a male other times the dark markings of a female, the body shape and size is the only thing making me assume female, my last male almost grew similar to a male FlowerhornJust by seeing the faded stripes as mentioned for the first pic, I want to say female. But the last picture almost spotted like a male. Is it by itself in a tank? They'll colored up pretty good if there's others in a tank with it.
But also noted mine are over dark substrate.