My student had adhd, but not diagnosed, so I can’t talk about official accommodations.
However, in sixth and seventh, most teachers offered after school office hours, to go over work, and give support in terms of writing and
exam review. Again, this not part of a 504 process, so teacher dependent. A couple of the teachers weren’t able to do better explaining material one on one than in the classroom. This was a small minority, but I want to temper your expectations. Also, a couple of teachers put the accent on organizing the notebook, which was graded. This would be good, in principle. But DC always got low grades for that, bc DC never caught on to the teacher’s system. Actually, DC is incredibly strong when decides to organize a notebook, but very rigid about how it should be done.
Another factor is the team to which your student is assIgned. The team leader I think is in charge of communication, and we got a weekly Newsletter that highlighted coming attractions, tests, major assignments, sometimes broken down day to day. Now, that was helpful.
The main problem, in retrospect, is that Deal is a big school with so many students. If your DC is the child who is apt to be distracted by social drama, they’re going to be devoting considerable bandwidth to all and sundry on a daily basis.
Again, no direct experience with special education support, but for a time, DC did an activity led by special ed teachers or counselors, and was very impressed. The guidance counselor assigned to DC’s class was very kind, and school leadership was very wise and supportive.