Its mentioned in the fight between Itachi and Sasuke that it can asses chakra, its part of how copying techniques is accomplished by observing the targets chakra changes as well as their hand signs. And Nagato had Rinnegan then, and he couldn't use Sharingan abilities despite it's being developed from the Sharingan. It's never explicitly said that the Sharingan itself can't see NE. Correct me if I'm wrong, but isn't the energy in Kabuto's cave part of the reason Itachi and Sasuke had trouble telling him apart from his surroundings?
Oh no the reason why the cave was ****ing with them was because Kabuto had a jutsu called inorganic reanimation.
Which allowed him to manipulate his surroundings at will.
So the floor, ceiling, stalagmites walls etc. Also
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And, while we're at it, isn't Sasuke's curse mark senjutsu? He learned how to control that.
But once again the curse mark works by feeding off the users chakra and giving them Oro's senjutsu chakra (because they get the finished product they undergo visible transformations not unlike sage mode. The curse seal is like a pseudo sage mode (not on par with Perfect sage ofc) since all they get is the power boost and durability boost, but they miss out on sensing and absorbing NE. The curse seal was made from Juugo's cells since his KKG was constantly absorbing NE, than enzymes in his body make him undergo
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Look clearly we're not going to agree on this. Let's just agree that it's not clear whether or not Sasuke can absorb NE or Senjutsu.
I'm not saying he can't absorb Senjutsu attacks with Preta path. It's clearly possible since Nagato Pain did it. Just that repeated absorption puts him at risk of turning to stone from absorbing too much.
Also that he can't you know absorb NE on his own like
Naruto, Kabuto, Hashirama, Minato etc