ive never even had hot nuggets from maccas. they are always only warm at best. this is in .au
according to the first thing that popped up from google, 52c (125f) for 2 mins can cause a burn. was the kid not in distress while being burned? i guess a parent might ignore a crying, screaming kid though?
this article has more details: https://www.cbsnews.com/amp/news/florida-girl-burned-mcdonalds-chicken-mcnugget-awarded-800000-damages-olivia-caraballo/
the child screamed, and the nugget was between 71-93c (160-200f) which seems fucking crazy to me