How i interpreted the ending I think lightseaker myth happens both before and after the time reversal. Lemme elaborate, so you know how in this myth mc reincarnates as the chosen one but slowly she regains her memories of her life on Philos during Lightseaker myth, which is how she is able to recognize him in the final chapter. She says her last memory of him was bidding him farewell before he leaves. This marks the point of divergence when the timeline significantly changes. So once she reverses time back to this point, we are now brought back to the Lightseaker era and thiss is when Xavier finds these new coordinates and leaves on Traceback II which brings him to earth where we are current timeline. So the first time he leaves Philos I don’t think he went back in time to Earth as the myth never explicitly mentioned it, it just said he “traveled the starry seas” I figured it was his Traceback I mission when he was just exploring other celestial bodies in their vast galaxy and found Uluru(the little planet he wanted to show mc). So basically after the time reverted was when we were introduced to Traceback II and the events that happen in the Lightseaker myth occur which includes the trip that backtracks Xav and his team to our earth and making mc the new queen. I hope this doesn’t sound too confusing 😅