A possibly trivial example, but I've found that I tended to be ignored in meetings. I'd suggest something, it would be ignored, and 5 minutes later someone else would say it and everyone would say "yeah that's a great idea". So you could call that out (I did but it looked really petty imo) or draw attention to colleagues who area struggling to be heard.

I've heard someone dismiss the idea of employing a woman for a post because the team was all male. For such a situation, a rebuttal would probably be heard more if it came from a man.

These are gender related because I'm white but you would doubtless find equivalents for other groups if you asked. Being aware is important I think