Does a sapodilla tree a monocot or dicot?

No, cactus plants aren't monocots. Monocotyledonous plants have only one leaf in the embryonic stage of growth. Cactus plants have two leaves, which is the hallmark of dicotyledonous plants. In fact, cactus plants are members of the Magnoliopsida class and Caryophyllales order as dicotyledonous flowering plants.