It’s super-hard to be a middle-schooler, and doubly so when you have ADHD and struggle socially. She will find her tribe, it just often comes later. My son didn’t make a real friend until 8th grade. He joined robotics club after school and found his tribe. Three years later they are still good friends (4 boys). I think it’s tougher for girls, because they are so much more dramatic typically. When my daughter was in middle school, most of her friends were boys — she said that was because she had no interest in girl drama.
Keep offering activities she’s interested in and she will eventually discover her tribe.
This article is geared toward teens, but many of the tips are applicable for tweens too:
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism