"Functionally cured" is completely different from "cured". Functionally cured means that, while there is still a small amount of infection in the blood stream, at the time, lifelong treatment is not needed. This is done by simply blocking the infection from entering viral reservoirs that hold the virus for a lifetime.
It is known that all children born to HIV positive mothers are born antibody positive (which can result in a positive HIV test) but, only about 2% of children born to HIV positive mothers receiving treatment actually develop the virus.
Simply put “cured of HIV” is, in essence, false hope.