Would you consider ADHD and ASD as disabilities? Watch
Disability is based on the person. A person is considered disabled if they have long term (as in a year or more) symptoms that have a significant impact on day to day life. That can include absolutely any condition or even undiagnosed issues. What matters is the affect on that person.
Practically it doesn't really matter what you call it except for official purposes. Some people may prefer to use words like "condition" or "impairment" to discribe their issues. Even a lot of people who would be quite universally considered disabled may choose not to refer to themselves as disabled most of the time.
But as far as things like work or school forms go where they ask "do you have a disability?", yes. Even if you wouldn't really consider yourself disabled or use the word in day to day life you can answer yes to that question if you feel your condition would impact your role and that you could benefit from support.
But again, if it doesn't affect you then you don't have to. It all depends on the context.