Or that their sales contacts treat women and non-binary folks worse than men.

https://www.newsweek.com/male-and-female-coworkers-switched-...

sales is literally you-eat-what-you-kill. you get paid % commission on sales regardless of your gender. There are so many sales people nobody would actually bother creating a separate pay grade for women and separate for men (and it would be highly unethical and illegal ofc)

For new business. But what about managing existing accounts, or renewals

Did you perhaps respond to the wrong comment? This is in no way responsive to what I wrote.

Who gets handed the best leads to the biggest fish? The people perceived as the best deal closers. Perceived. This is where you can hide the most sexism, along with other confounders, yes.

And every other human social bias: attractiveness, confidence, loyalty, etc.

You can’t point to gender and say that’s the clear and overwhelming bias.

I think the orthodox Left response to this would be that the unseen hand of the patriarchy and general internalised gender roles cause women to hustle less/advocate for recognition of their performance less than men, or for men to overlook their contributions.