I would look for a social skill group or summer camp.

Kids with ADHD generally understand appropriate social skills in the objective, but can't implement them effectively due to 1) lack of impulse control; 2) not being focused/checked in enough to "read the room." For this reason, traditional social skills classes and camps often don't work well to remediate their issues. I would 1) discuss changing or increasing medication; and 2) call around to PEERS programs to see if they may be a fit. This is the one type of social skills program that has been shown to have some impact.

I would look for a social skill group or summer camp. And I would consequence every time. He should write apology notes and deliver them in person.

I'm exasperated by the social problems my ADHD teen son creates for himself with attention seeking behavior. He is medicated and in therapy and is being seen by a psychiatrist, but nothing seems to help. Troubling behaviors include claiming he is gay when in fact he is not (I would be fine with it if he were, but in he is actually girl-obsessed), which offended actual gay students and made him targeted by homophobic students. Other recent issues this year include saying something extremely rude and impulsive to an overweight teacher to get laughs from the class. It is like he doesn't care if it is good attention or bad attention. Then, he is miserable all the time at home due to social problems at school.
My ex and I coparent fairly effectively, and we have talked and talked about what else we can do, but we are out of ideas. My son's therapist wants to stay the course of treatment, but I feel like we need more immediate relief or change. Does anyone have suggestions or advice?