Nah. You can make friends at any age. Most of it comes down to showing interest in the person you want to befriend and asking them about themselves.
Imo as an ADHD person this world best for me. The hard part is finding the interesting person I wanna befriend. Most have happened casually through games or events. If you board game. Or pickle ball. Or shit join a cooking class. Good chance you'll be interested in someone in the bunch.