Personally: Hiking, biking, photography, DnD, and fixing things.
It sounds like a lot (because it is lol) but with ADHD having a group of hobbies I can orbit around (especially if they can overlap (like these ones))can help me avoid diving into too many new hobbies.
I used to get that years ago but I think life’s traumas kinda broke my ability to experience pleasure, so I no longer seek it out. I don’t experience pleasure or joy from activities or people and basically don’t engage in either.