You should read the labeling guidance from FDA because you are severely misinformed.
For the fat sub-lines, they can only say 0g of trans fat if itβs less that 0.5g. From 0.5-5g, you have to express to the nearest 0.5g. Then for >5g, you round to the nearest gram. Servings sizes are also regulated. Whether they are accurate for how much you consume or not, manufacturers have little flexibility in what they list as the serving size.
Also, companies have different formulations for different markets. For their major markets where they sell enough in that country/region to substantiate a unique formula, they formulate the product to maximize taste appeal to people in that country while meeting minimal compliance guidelines. Coke is very famous for doing this and has dozens of unique recipes for classic Coca Cola around the world.