You are broken down and your essence (Soul and what is left of your body) is permanently sealed within the Master Sword, if the cutscenes are anything to go by.
Even after the Master Sword was heavily damaged during BotW, Demise was not unsealed. Nothing has broken free from this seal. Other seals in Zelda have been broken, such as the seal Zelda put onto Ganondorf at the end of OoT, or the seal in BotW. Throughout all of this time, even when its power and edge was lost during the Wind Waker, the Master Sword has kept Demise sealed away.
Even then, Sora's Causality Manip does not appear combat applicable. He did not reverse attacks, merely the state of the world and the deaths of others. Were it shown to have uses like say, Giorno's Causality Manip, well, then it would be a different story.
Additionally, the Triforce could just Thanos snap Sora, except far more powerful. Though this point is contentious since the Triforce's EE is a bit vague in terms of just how it works. Ancient Arrows aren't though.
So in other words, stomp for Link, GG, close the thread. Nothing Sora can do will have effect on Link, Link has too many ways to kill/eradicate Sora, and Sora's one way to force and incon is likely not combat applicable.