is it though? this is or was available worldwide, and not every country has a history of blackface.
i think it would have been way more racist to exclude African features on the assumption that black people are too fragile to handle the app, tbh.. thats just my opinion though and im not black so fuck if i know.
i will say though, we can be pretty sure that the app makers did not take into account all the different facial features in Africa, because in reality there is of course tremendous variety (i would guess at least as much as in Europe or Asia, probably more) .. Somalis, Nigerians, South Africans, Masai people etc etc all look very different thanks to the huge genetic variety on the continent. so maybe its racist because they simplified it too much.. i can buy that.