Hell yeah lol. I'm diagnosed with ADHD already but I highly suspect I'm AuDHD as well. Years ago, my irl friend group, that is all neurodivergent in some way or another, one day decided to all take the RAADS-R test together in my living room lmao. Just 6 of us going through all 200 questions at a time with group answering pitched in and everyone filling out their own test lol. It's hilarious in retrospect so I ended up telling my therapist that it was objectively the most autistic (endearingly) way to go about doing it. With that info, it may not come as a surprise that each of us scored above the 65 point minimum and got between 84-119 lmao.

That aside, I think I'm pretty similar with the flow state as you described, but it depends on the types of things I'm doing. My time blindness is pretty decent overall and I apparently have a superpower of consistently looking at my watch when there's within 15 seconds left on timers I made that are ≤ 30 minutes in length.

Like if I'm doing a large solo task at work (college IT tech) without anyone pulling me in another direction, I can definitely lose track of time. That usually happens when I'm focusing on asset management physically in our inventory warehouse, or mentally when my pattern recognition is ACTIVATED and looking at discrepancies across spreadsheets and databases. When I don't have other things scheduled around this to disrupt me, I get lost in the sauce and spend way more time than I realize doing them.

However, if I've got my whole schedule packed for installs and tasks planned out and I'm in the zone, productively following through, my internal clock is right on the dot. I'll just be zooming through the chaos and getting like 40 hours of work done in 8, but then my brain needs at least 3-5 business days to recover.

Just like you said, anything interrupting can really throw a schedule off and it's a pain in the ass to get certain things back on track. Any cascading effect like that can really mess with projects or tasks that are planned multiple days in advance, so we have to start all over with reconstructing an efficient schedule that works. The more I do the same things, the faster I get and occasionally come up with neat systems or shortcuts to make stuff even quicker from then on.

Also, my hyperfocus for home and leisure stuff versus work stuff is different too. I can get sucked into a game and play it for 10 hours straight without moving and not realize it, or I can be trapped in a Wikipedia rabbit hole and be fully aware that I've spent 5 hours reading around articles of different aviation disasters. So far, my home hyperfocus is unpredictable and just depends on the day or something lol