I’d like to ask Senior Zhinü: In this diagram tutorial, the red area I’ve drawn has…

ike to ask the senior weaver—on this charted tutorial, in the red area I’ve marked, there’s a yarn‑over (or “return”) process. Is this return stitch used after finishing the neckline and before starting the jacquard pattern, to shape the back neck? Or should it be done after completing the jacquard, once all stitches have been added and you’re ready to divide the front and back pieces? Could someone please advise? Thank you so much! {}{}{}