Nestlé isn't the only brand of baby food available in those markets, they sit right next to products that do have that "no added sugar" label. But that healthier alternative is not what sells better, the cheaper ones do, why? Because the consumers in those markets either can't afford the healthy food or they lack the education to know the importance of a good diet.
What products are available on a market is a reflection of the purchasing habits of the consumers in that market, and those habits are a result of the macro socioeconomic factors of the region. If Nestlé changed all their products to be "no added sugar" right now then the prices of those products would need to be bumped up slightly which would mean the consumers would shift to another brand that's cheaper which has the same issue and hey presto nothing has changed.
Nestlés products having added sugar is not the problem it is a symptom.
So what do we do if we want to solve these big problems? Well that's not easy, it largely depends on the governments and people of those regions, but we can help. There are charities like plan-international.org which tries to directly tackle inequality and education, but driving economic activity can also help, maybe next time you go grocery shopping you buy a Senegal peanut oil or a pack of batteries from The Philippines. These are big hard problems that won't be easily solved, but if we are to have any chance to fixing them we need to be able to identify what the problem is, getting mad at a brand is a lot easier than recognizing the underlying issues.
While ideally you'd want a column for serving size, package size, and per 100g, if you're only gonna have one it should definitely be the per 100g since that's the only one that allows you to easily compare between different brands and products.