> with configurations like my last job where both my team lead and the manager were women.

I guess you have to get used to such "configurations", given that in a fully equal world having both a female team lead and manager is entirely possible. Or how does this confirm your claim that women are unfairly promoted more frequently?

The reason for quicker promotions is probably a skewed distribution of personalities, as also mentioned further below. Men of all personalities are more likely to start science and engineering degrees because they are nurtured into it by society anyway. Women have to be the kind of person that does not care about such biases, and develops and follows interests.