Maltodextrin is a plant derived carb that’s used to thicken foods. It’s not a sugar. Also, Original Pringles, at least the in the US, don’t have citric acid.
Also worth noting, the reason Pringles have emulsifiers and thickeners is because the potatoes are mashed up and poured into a little mould. They need to be thickened and well mixed so they stay together when fried.
There isn’t anything too crazy in there. I’ve used these ingredients at home. They’re easy to get and can come from plants.