The treatment was done 13 years ago, I didn't think they were gene editing back then so I assume they come from donors? Does that mean they require immunosuppressant drugs?
They do come from donors, and immunosuppressive drugs are not required. Transplants of tissue from living donors like bone marrow is very different from tissue from deceased donors like hearts and lungs. With transplants from deceased donors, the pool of donors is small and there's very little time to choose a recipient before the organ goes bad. In practice, that means it isn't always a very good tissue match, and it's usually necessary to give the recipient immunosuppressive drugs to avoid rejection.
With a transplant from a live donor, the pool of donors is larger- much larger in the case of hematopoetic stem cells or bone marrow, which grow back completely- and the tissue will keep indefinitely. That gives doctors plenty of time to search for the closest possible tissue type match, so the recipient and donor are generally perfect or nearly perfect matches. They won't even try to do the transplant unless there's a very close match.