So, turns out it's legit.
Mcd's is making Szechaun sauce for one day at limited locations.
Fun times we live in eh?
https://buttermilkcrispytenders.com/
https://www.today.com/food/mcdonald-s-beloved-szechuan-dipping-sauce-making-temporary-return-t116960
Saturday only, select locations. Everything tastes better with szechaun.