Thats a good looking fish. Can't help with the gender, but I will say I'm interested in what that parachromis would look like with a dark substrate and background.
The background might work well...maybe a darker background with the light sand. I think the jag would pop its dark colors more, make it easier to tell gender.
Judging from the picture of the vent, looks female. A nice colorful one too. But it looks young still so give it more time to grow and maybe it would be easier to tell.
99% sure male. Females have lines of spots down the side, I can see the dark spots on lower jaw wanting to come out but your substrate is too light. Put him in a tank with dark substrate and he’ll look good