Just so you know, absolutely none of that is true.
https://en.wikipedia.org/wiki/Pyramidion_of_Amenemhat_III
I don’t know if the person who posted that is sincere or not, but plenty of people sincerely believe this sort of thing when it is posted on Facebook.
But my uncle TimTom said it was true!
My uncle JoJo said it was true too!
My neighbors brothers uncle JimBob knows JoJo so I know it’s true.