I wonder if you can try to work through a journal/workbook with your daughter to help her better understand how her ADD impacts her life. Sometimes, when you live with ADD you often don't realize that what you think or feel are not typical. This is especially difficult for teens who don't have the life experience to understand that not everyone struggles to focus or remain on task.
I have used this guide with my students and along with conversations it can help bring about some new understandings.
https://www.amazon.ca/ADHD-Workbook-Teens-Activities-Motivation/dp/1572248653
That’s sorta hard bc your parents do have to bring you to appointments. Do you see a doctor? Or is there a teacher you can talk to, and maybe ask them if there is something through the school that can help? Those might be people who can support you. Otherwise there are some good books that you could turn to. As a grad student who’s a therapist, here are a couple of trustworthy sources. You can sometimes find these cheaper off Amazon.
Sometimes inattention can also be related to anxiety or stress, so I’m gonna put a workbook in here too just in case that’s going on.
https://www.amazon.com/ADHD-Workbook-Teens-Activities-Motivation/dp/1572248653
https://www.amazon.com/Smart-but-Scattered-Guide-Success/dp/1462516963/
https://www.amazon.com/Anxiety-Relief-Teens-Essential-Self-Care-ebook/dp/B0852PH4HS/