The Teamable diversity filter allows you to search by gender and ethnicity. To use both gender and ethnicity, select a gender AND, then select an ethnicity. Teamable uses machine learning to identify ethnicity with image matching. While not foolproof, it works pretty well!
You can also choose multiple ethnicities if you wish. As you select each, a context cue will confirm it has been added to your search. Simply click 'Go' once you're ready to review your updated results.