The advertisement also proclaims glucose syrup solids and corn syrup solids as sugars, but in fact, these glucose polymers, depending on the grade, contain between 60-90% long-chain polysaccharides, which acts as a source of energy, just like when we eat other carbohydrate like rice, bread, noodles. These of course, are eventually metabolised into glucose for easy absorption into the body, but these cannot be considered as added sugars, simply because they are not. In fact, the FAO/WHO Standard for Infant Formula states that lactose and glucose polymers should be the preferred carbohydrates in formula milk.

You are right to point out that most manufacturers will add minimal amount of sucrose (table sugar) into growing up milk to make them more palatable to young children but the amount is small, only about 2-3g, equivalent to about 1/2 teaspoon per serving.