The show's creator confirmed in an interview that she was nuerodiverent. I can't explain it as well as she does, but the gist of it is "Yes she has ADHD, but it's not really a hindrance. She's a visual learner, she wants to do a bunch of things at once, but she sometimes struggles with fitting in and trying to be normal."
Whether or not Autism's in the picture is still just a theory. But regardless, I think she's one of the best example of ND representation I've seen on TV. I don't have the link to the interview itself, but here's the video I found it in.