so i opened a world ( to try a data pack) and found pink sheep heres a text from the wiki,Pink sheep in Minecraft according to the Minecraft Wiki have a 0.164% chance of spawning. A baby pink sheep is even rarer with a 0.0082% chance of spawning. Thats less than a one percent chance to find a baby pink sheep. The better way to have a pink sheep is to just dye it.