Welcome! The patterns in your ds' scores are very similar to my ds' test scores at 8 (end of 2nd grade) when he was also diagnosed with dysgraphia, disorder of written expression and ADHD. FWIW, the ADHD diagnosis did *not* hold up over time. In our ds' case, the ADHD diagnosis was based on input from his 2nd grade teacher combined with borderline results of an attention test during the neuropsych exam. The behaviors that his teacher was seeing as problematic and typical of ADHD disappeared when summer started and he was no longer in the classroom where he'd been beyond frustrated with the combination of an unrecognized LD combined with lack of intellectual challenge. We started implementing accommodations and made a change of type of classroom environment in 3rd grade and that made a world of difference for our ds.
The one thing I'd do this summer if you do anything, is to have your ds start typing. BBC-Mat typing (online) is a fun place to start for early elementary kids - all three of my kids enjoyed it.
If your ds has pain from handwriting or uneven pencil pressure or a funky pencil grip due to the dysgraphia, handwriting OT might help. It can also help with teaching him the proper way to form letters if he is forming them bottom-up etc.... although to be honest, our ds never really did learn that in a way he can remember it (which happens with some kids with dysgraphia). Handwriting was really painful for our ds until he went through OT, so we didn't do intensive learn-to-write therapy when he was young.. but I think he most likely would have forgotten a lot of it anyway. He learned how to write cursive in 3/5th grade at school and has now completely forgotten how to write in cursive after not using it at school during 6th grade.
I would also turn in a written request for an IEP eligibility meeting now if you haven't already. Even though the process won't happen until the fall (I expect), if your school district is typical, there will be a lot of things going on at the beginning of the school year, and it can take some time to get requests put into action.
Best wishes,
polarbear