I haven't been fully tested but my doctor agrees it is likely I have ADHD and this is all new to me, grain of salt.
I definitely do things without thinking. Drinking, snacking, vaping, reaching for phone just because my hands need to be busy. Mindless stuff.
As for what I think most neurotypical people consider habits I have maybe one that is somewhat automatic for me and that is I ALWAYS do my skincare and teeth before bed. But part of that is because that routine is really good sleep hygiene. Like it is still a decision, still a bit of a chore, but it would feel VERY wrong and off if I didn't do it.
Then um let's see I've been taking the same medication at the same time for over 15 years now and I still need an alarm on my phone and I have still forgotten to take it if I don't take it that very second. At least most of the time later in the day I suddenly remember...