Well, the Oatly Barista Edition matches cow's milk for nutritional content surprisingly closely - fat, carbohydrate, vitamins, minerals and so on. We give it to our toddler, who's allergic to cow's milk protein.
1g of protein per 100mL is not as much as cow's milk. Although, human milk also does have around 1g of protein per 100mL, so I guess it's fine for toddlers.