@Fragglemuppet
This doesn't directly answer your question, but…
If you think you're autistic (possibly and ADHD, aka AuDHD), you are welcome to chat and seek resources in the #ActuallyAutistic (and @actuallyautistic) community. We consider self-diagnosis entirely valid 'round these parts!
Personally, I've never been formally diagnosed through a neuropsych eval. I have an unofficial Dx by a psychologist and tons of lived experience.