Hi anon! Sorry for taking a while to get to this
This is kind of hard for me to answer.
Firstly, because the definition of what counts as neurodivergent seems to vary widely (I feel like I for a long time saw it used basically just for ADHD and autism, but some people also use it for mood and personality disorders)
I know why a fair amount of autistic and ADHD people relate to him on some level; and also why his struggles with anxiety are relatable. I think it's valuable to talk about one's specific experiences and how Paul's behaviour might be similar, because it can help everyone understand each other better and approach situations in a more nuanced and empathetic way.
That being said, I doubt Paul has a diagnosis for any of these things and I feel like you can't really say that he's immensely struggled socially. He's a star and a known charmer, and while he did spend time on his own as a kid, it doesn't seem like he ever specifically struggled to maintain relationships… My point is, whatever he may or may not have, I don't think he struggles a ton with it, at least not when his life is on the whole going well.
Personally, I don't really have any interest in proving Paul is any specific type of neurospicy, partially because I don't find his behaviour difficult to follow (in contrast to John, who I think can easily seem completely irrational without the framework of two or three mental health issues he likely had) – but then again, I am someone who has spent years thinking she probably has at least mild ADHD(and done next to nothing about it) who has a bit of a pattern of bonding with ADHD and autistic people. So idk. maybe other people do need that framework to get Paul more?