What do you expect the approach to be when your goal is to go out into the world and find qualified people in demographics you aren't getting naturally in your applicant pool? If you want to hire women software engineers you solicit applicants from "women in tech" events and groups.

The belief, whether you agree with it or not, is that diverse teams produce better results. If your natural applicant pool is all dudes then your job as a headhunter is to find a woman who you think can beat them on merit.

The other way you do it is you hire them on as juniors where everyone's resumes might as well be written on toilet paper and "most qualified applicant" is a bit of a joke and train them up.