The details I mentioned are about how the Sasha just left after he got injured to a mision out of town to keep her distance from the MC, they met many times afterwards but just ignored each other, she had many many chances to apologize but never did for 2 whole years.
The current situation with the MC and Sasha is that they are on good terms, enough to go together for the final mission. They are basically in a "MC doesn't forgive them, their previous relationship is dead, but now they have a new relationship" state, and really, this has basically been a thing since almost the beginning, it is weird because multiple times they kinda move forward, but it is still this "new relationship, the previous one is dead" thing. There was a time when the MC had a mental breakdown because he noticed he didn't have issues with joining forces with his previous team for one of the epic dungeons, and that was a whole drama of "damm we really need to solve this now" but nothing got really solved, they just talked, said the same things they said before, Sasha still doesn't regret her decision, Haise still doesn't forgive them, but they have this "new relationship" bullshit which AGAIN it is the same thing they reached 100s chapters ago, but somehow now they can work together (which they already did before btw) and stuff. The funniest thing is that in that same mission, Sasha is shown an alternative reality where she didn't banish Haise, it was shown to be great, and we still don't get a "oh fuck, maybe I was wrong!" from Sasha 😭 I don't get the author, why do you show her that just to not get anything out of it?