First of all, I am not a mental health professional, so I might be wrong here. My understanding is that ADHD manifests itself with a collection of symptoms and degrees. You get diagnosed when you reach a certain threshold of all the possible ones.
The inattentive aspect, which is the one I predominantly have, seems to have "missing social cues" on its list of symptoms.
There's also the indirect problem of children avoiding ADHD children and them getting less social practice as a result.
This might be relevant https://www.foothillsacademy.org/community/articles/adhd-soc...
Everything else is the same as me. I have unconsciously learned to use anxiety to be on time. Any time I have something major planned the next day, I can't sleep. I am anxious all day until the moment comes, and then I ease up.