That's old news in research circles. ADHD has features you may or may not have: impulsivity, hyperactivity, and inattentiveness. Supposedly these traits are from a weakness in the brain that controls the "turning off" of other parts of the brain-- that is, you can't suppress as easily the thoughts and behaviors. I'm simplifying, btw, and why things like Adderall sometimes works or not kinda depends on what's causing that weakness (e.g. neurotransmitter uptake, underdeveloped section of brain, etc).
Now, imagine where creativity comes from. When your brain gets to just run without suppression, you think of weird shit. Those untethered thoughts can lead to creative inspiration, outside the box thinking, and so on.
There's other strengths to ADHD, too. Impulsivity under another label is initiative. Hyperactivity under another label is high energy. ADHD is often defined by how inconvenient it is for neurotypical folks, but it shouldn't. I mean, job posts frequently call for high energy free thinkers with initiative--- little does HR know they're asking for folks with ADHD! Lol