That’s not how time works at all. Going back in time doesn’t put you in the same universe, that’s how you get paradoxes. What if link killed his mother before he was born? How would he be able to kill his mother if he was never born. We see the same thing in OoT with the song of storms. The only...
They don’t exist in that timeline. If you’re talking from the perspective of someone living in the great sea, TP never happened. But from an outsider we can see that if (X) happens (Y) happens as a result. If (link dies), (LttP onward) happens as a result. The events of OoT happen in all three...