

The child had albinism. There are known cases in other African countries where people with albinism have been killed and their bodyparts been used for “witchcraft” purposes. (https://en.wikipedia.org/wiki/Persecution_of_people_with_albinism)
But it took a turn when prosecutors alleged that Smith sold her daughter to a traditional healer, who was interested in her eyes and fair complexion.
I think that implies that the child was literally butchered and its bodyparts sold.
You can make a mold for a keycap stump and stem cavity, make a resin cast, then glue the keycap on. Maybe you can modify this: https://github-wiki-see.page/m/imyownyear/Z-Butt/wiki/Z-Butt-Mold-System