What is gender?

It is not being male or female. That is sex. Sex is being male or female.

What is gender? I'm failing to see an answer to an honest question. You like to redirect when you have no actual answer but feel you know you're correct?

Gender is sex stereotypes. The idea that women are nurturing and men are aggressive is taught and learned. Unless the brain scans of male and female newborns are scanned, show differences, and those differences stay on those scans through adulthood, we can say the differences are learned because of neuroplasticity. We know it's nurture. We know that. We have zero evidence of anything described as "gender."