Board Thread:Theories and Speculation/@comment-45382951-20200609150217/@comment-26636534-20200611153837

I don't think that it was clear that Sasuke could sense natural energy. If Sasuke could sense Naruto's chakra through dimensions after Hagoromo power-up, then it stands to reason that Sasuke could sense sage chakra build-up. And therefore infer a large amount of NE by deductive reasoning.