People think kaya pau is light because it is steamed and fluffy, not fried. Fair, no frying oil. But that fluffy bun is basically sweet white bread, and the kaya inside is pure sugar and coconut. One bun is 215 calories of mostly carbs.
It is not a disaster, it is actually one of the gentler snacks on this list since there is almost no frying involved. Just do not eat it thinking it is a free pass. One pau with your kopi is fine, two is creeping toward a meal worth of sugar.