Many colleges have excellent services for students with special needs including adhd. They usually want verification of the disability, and the student has to request any helpful accommodations.
My adhd family members medicate and we worked on EF skills over the years. We tend to stick to scientifically backed solutions. Medication + working on the necessary skills. The meds help them learn the skills and form the necessary habits so they can carry through hopefully without meds. In our case, over time we’ve seen positive results.
Medication had an almost immediate effect, my kids on meds were really happy with the increased ability to focus on all things, even the fun stuff.