“Twice exceptional” (2e) is the term used to describe intellectually gifted children with great potential for academic achievement who also have a learning disability or neurological challenge, like attention deficit hyperactivity disorder (ADHD or ADD). Their exceptional intellectual abilities of 2e students are often masked or obscured by one or several conditions (or vice versa), making them one of the least recognized and supported populations.

https://www.additudemag.com/twice-exceptional-adhd-signs/