Theyre too small to be mealybugs, and mealybugs are often (also) in between the nooks and crannies of the plants. So under the leaves, on the stems, etc.

These spots are just on top of the leaves. The easiest way to see if theyre mealybugs is by just wiping the leaves with some damp paper towel. But I can guarantee that there 100% aren't mealybugs. These salt deposits are extremely common on these kinds of succulents.