Support/Friend group for teen with an invisible health disability

I have a bright, funny, 18 yo who has a chronic health condition. Due to her health she's been out of the school/ friend/social loop for many years. She's interested in finding a support group or young adult group with other young people who "get it" and can support one another as they navigate young adulthood. If you have any suggestions at all, please let us know. We appreciate your caring consideration.