Well, the reason he can't seems very reasonable to me.
One - Sasuske has never seen any of the Six Paths Techniques used in front of him. I believe the only Rinnegan user he met was Obito and Madara, and I can't recall either of them actually using any technique in front of Sasuke. For that reason, I don't think he even knows about them.
Two - Sasuke isn't aware that he is capable of doing them. Similar to how Naruto had no idea that he could fly
Three - Naruto doesn't recognize Sasuke's eye as a Rinnegan because it doesn't match the one he saw on Nagato, so he couldn't tell. Even if he did, Naruto would most likely be too dumb to recognize it. Same for Kakashi. He doesn't recognize the eye as a Rinnegan like Nagato's, so he can't tell Sasuke that he can use the technique