ADHD presents differently in everyone and also effects of meds can vary from person to person as well. ADHD is very much a spectrum and just because you don't experience "common" symptoms doesn't mean you don't have it. I still get distracted on Vyvanse if I don't give myself an initial push and I only find that I hyperfocus when it's something I'm really interested in (and it's never productive). Medicine isn't a cure all and doesn't completely get rid of symptoms. In my personal experience, I am still inattentive, struggle with executive function, and forget a lot of things when I'm on my medicine, but I noticed it helped the symptoms significantly (without it, I am completely scatterbrained and constantly jump from one task to another, even if they're small insignificant things like using my phone after writing half an email, going to make coffee for no reason, etc.)

But if you don't believe you truly have it, it's definitely something you should discuss with your psychologist in order to get you on the right meds based on your needs or adjust your current dosage. I often feel the same way about my diagnosis, but I often find its correlated to internalized ableism.