Sasuke along with Naruto was given an equal share of the Sages remaining Chakra so if that chakra unlocked "The Rinnegan" in Sasuke's eyes it mean's that it's his own version of the Rinnegan and should not be tied to the Sages own original Rinnegan or even be called that or why are you even stating that Sasuke know nows every technique known to man if that were true then Nagato/Madara/Obito should of exibited such tendencies instead they just showed they're own techniques
Wait what? I never said sasuke possessed every tech in existence I said he had the potential too, seeing as it's already been stated that the rinnegan can actually accomplish such a feat. Obito's and nagato's rinnegan are technically Madara's rinnegan so...i mean...it's kind of redundant to say they showed their "own" techniques when madara is the original wielder and would have greater prowess. The reason I compared sasuke's rinnegan version with the sage's is because well basically the sage passed down his power directly to sasuke, albeit it's sasuke's own variant, unlike the sage's it's one rinnegan in one eye, an oddity as it can be compared to the rinne sharnningan which is on the forehead (not counting the juubi itself), meaning there can only be one of it. So in a sense it is like a mangekyou rinnegan in a sense, think of it as indra+Hagoromo's yin. If indra was born with the sage's yin then it's only amplified by the sage's yin directly then it only makes sense that sasuke being able to do a lot more. The sage a god, son of prime kaguya was surprised that sasuke could place all the bijuu under his control with only a glance and this was unmastered. The difference between madara's rinnegan potential and sasuke's is that while madara mixed indra's and ashura's chakra to get his rinnegan while sasuke's is a combination of indra and the sage's itself to form his. Also unlike madara, sasuke still retains his sharnningan properties along with the rinnegan's own properties in his eye. Since all chakra originated from kaguya, meaning all techs originated from her, then her son hagoromo born with her diluted rinne sharnningan (rinnegan) along with his brother, it was said the sage could master any tech through the rinnegan (possibly save for rinne sharnningan techniques) and this yin power was passed to sasuke it isn't a stretch to say that sasuke can master any tech as he even has indra's power as well. Technically sasuke has the power of two progenitors, hagoromo(half) and indra's sharnningan. So really it isn't that huge of a stretch.
The same could also be said for Naruto, since he acquired the yang, physical wise he's on another level from most ninja, perhaps he himself could learn the Eight gates or any other taijutsu tech, it isn't that huge of a stretch.