Yes, I did a full assessment (not just autism) and I kind of gave up by the end. I panicked a bit but I've also had really bad brain fog lately. The room I was in had very bright lights, the HVAC was buzzing and humming and I was in a chair without a headrest...it felt like literal torture. I had to skip an entire visual processing section and passed on several of the intellectual questions because my brain simply could not work.
I didn't have to do any tests when I was assessed for autism. For my ADHD assessment yes, there were lots of skill tests. But the whole point is that you flounder in a very specific way so they can tell if you have the thing they are testing for.
I sought a (re)diagnosis of, or at least assessment for: ASD, ADHD, OCD, GAD, and MDD. I ended up with four out of the five minus OCD but it took half a dozen hour-long sessions with clinical psychologist for him to get the subtleties of the differential worked out. I did most of it over Zoom from my own couch and was still exhausted before the end of the second day.
Edit: still aced that puzzle shit on the last day tho