Not OP, but on the spectrum and also diagnosed with ADHD and sometimes I'm not certain where one ends and one begins.
I have hyperfocus for my "special interests" (spectrum) and very little focus for anything that does not intrigue me (adhd) but to my eyes these are the same thing: I just don't have much deliberate control of my focus.
There's some other areas where it doesn't map so cleanly to thinks I am interested or disinterested in. Jigsaw puzzles don't interest me, it's incredibly mentally painful for me to focus on one, but I also can't walk away from one. I have the hyperfocus that I get with my special interest combined with the pain of ADHD where you wish you could control your focus (in this case, focus on literally anything else.)
Another area of overlap: I associate my extreme social anxiety with autism, but if I take ADHD meds it goes away almost entirely, and my social skills also improve. I think this is again a matter of focus: I stop focusing on social hypotheticals which reduces anxiety, and I also go with the flow rather than work consciously on social interactions, which makes them smoother and less awkward for the counterparty.
I have hyperfocus for my "special interests" (spectrum) and very little focus for anything that does not intrigue me (adhd) but to my eyes these are the same thing: I just don't have much deliberate control of my focus.
There's some other areas where it doesn't map so cleanly to thinks I am interested or disinterested in. Jigsaw puzzles don't interest me, it's incredibly mentally painful for me to focus on one, but I also can't walk away from one. I have the hyperfocus that I get with my special interest combined with the pain of ADHD where you wish you could control your focus (in this case, focus on literally anything else.)
Another area of overlap: I associate my extreme social anxiety with autism, but if I take ADHD meds it goes away almost entirely, and my social skills also improve. I think this is again a matter of focus: I stop focusing on social hypotheticals which reduces anxiety, and I also go with the flow rather than work consciously on social interactions, which makes them smoother and less awkward for the counterparty.