Having been a test prep tutor for nearly ten years now, I’d say at least a third of my students have testing accommodations. This is probably due to where I live because my school district is well known for providing good services and parents here tend to be very proactive about getting their students set up for accommodations. However, in the twenty years I lived in the district, our high school never once hosted standardized tests.
I mention this because all students went to neighboring districts to test. Except for 2020, when there simply wasn’t the manpower or space, I haven’t encountered a student yet who was not given the assigned testing set up. So maybe it was just unlucky that the student above didn’t get the right accommodation at the site. Maybe it was the short window between being approved and the timing of test day. Maybe that school was new to hosting. It’s very unfortunate, but I don’t think it’s the norm. In fact, we rarely see posts here on CC about such incidents.
In my experience, students haven’t had issues. That doesn’t mean no one has issues, of course.