The real culprit in lor mee is that seductive thick gravy bro. It looks harmless, like a thin soup, but it is thickened with starch and carries oil and a beaten egg through it, so that brown sauce is quietly a chunk of the 520 calories.
It is not the worst hawker bowl out there honestly, because there is no coconut milk and the protein from pork, egg, and fish cake lands around 20g. The trap is the fried toppings, throw in some fried fish or extra deep-fried bits and you jump to 650 fast.