The diagnosis criteria doesn't exclude them. Child abuse doesn't discriminate; anyone can be abused, unfortunately. Extroversion/introversion, to my knowledge, is something you're born with, rather than developing over time. So, for sure, it's possible.

Introverted people feel like their energy is drained off when they're interacting with people, and extroverted people feel like they can only gain energy by interacting with people and they feel like their energy is drained when they spend too much time alone.

So can you imagine - having to be around people when you fear being judged, when you have low self-esteem, when you can't interact with someone unless you're sure you're liked, which feels impossible because you think you're unworthy. (Wait, that might be my experience - perhaps there are avoidants that can feel worthy if they are liked; for me even if I am liked I still feel unworthy.) That seems like it would be impossible to deal with.

I think - trying to imagine myself in their shoes - that they can blend in a bit better. They don't stand out as extremely standoffish wallflowers. I'm sure they realize they have to keep quiet about their poor self image because it's off putting to people. Because they are interacting with people, they probably aren't as affected by isolation, maybe with less depression, but plagued by impostor syndrome. It must be horrible.

Of course, I'm imagining all that, because although I like being around people (when they leave me alone lol) I'm still introverted and it's extremely draining for me. Luckily, for the most part, I get to choose exactly how much or how little I'm around people, so I can keep it in balance, and usually I don't get caught out and swamped.