I served in an airborne unit in the army. All the women I served with could do quite a few pull-ups, some more than me. In an airborne unit, pull-ups are more necessary than in most other units as you have to be strong enough to pull the risers of your chute to steer yourself.
In a chute without real steering, this is the only way to do it, and it requires nearly lifting your entire bodyweight using the same muscles as a pull-up.
I think I could 19 pull-ups at my best. Maybe a bit more. I knew at least one woman who could do 40+. She wasn’t even that bulky, just short and strong.