No it’s a well-studied woman thing.

“… women tend to be underestimated more. They tend to be interrupted, more talked over more. They have to prove their competence more and we often feel uncomfortable when they’re in positions of authority.” https://www.forbes.com/sites/michelleking/2021/10/26/the-authority-gap-why-women-are-still-taken-less-seriously-than-men/?sh=3ed8223e634d

Oh dude I went the other way as an adult. I have a deep voice and I’m tall so I’m pretty obviously trans.

Even so people went from just default listening to me and taking my ideas seriously to just ignoring me half the time. It’s most egregious with strangers, if I speak about anything technical people often overrule say my opinion on something physics (An area I’m pretty knowledgable in and relatively good at communicating) for some half remembered anecdote some man told them, previously they’d be like “Oh wow that’s interesting, I always thought X” or something far more indicative that they listened.