My 12 year old isn’t autistic as far as I know but he does have a few traits that make me question this sometimes. He goes through phases where he learns everything about a subject: cars, dinosaurs, space, Pokémon, aeroplanes and then wants to tell you every little bit of information. It’s not a conversation, it’s more like a documentary.
He has normal conversations at other times and I don’t really have any other areas of concern apart from he can be anxious about things but again, not all the time and to me they’re semi reasonable things like not wanting to go into a dark enclosed muddy hole on school camp, slightly worrying about planes crashing and sometimes more existential things like “how do I make my mark on the world when I only have 80 years or so”.
So, do your otherwise NT boys (or girls!) do the thing of learning everything about a subject and then talking at you about it? My other son doesn’t do this at all.