I had a near gaffe like that when I thought someone had brought their tween boy child to a staff meeting. (Wouldn’t be unheard of, considering two people brought their dogs.)
Then this person was selected for a peer nominated award and went by she/her pronouns and was apparently an adult employee.
How embarrassing it would have been to misgender her or ask whose kid she was.
I suspect, though I don’t know, that she is a trans woman who took puberty blockers, and that is a really good example of why it can be really helpful to know people’s pronouns up front, as well as a good reminder that a lot of people who take puberty blockers can look younger than they are. So don’t assume gender OR age!
I confess due to social anxiety it’s hard for me to introduce myself to new people and the idea of actually asking someone their pronouns and potentially offending them feels intolerable. So I usually just wait until I hear what pronouns their close co-workers are using for them. And pay attention to their email signatures and how they identify at meetings. I’m grateful that is normalized at my agency. We have I’m guessing a higher than average rate of out trans employees, so being up front with pronouns is just the done thing.