Does Nikkah need to be done again?

Last year I gave my marriage with your daughter another chance when she agreed she would listen to me & do as I told her. She has failed to do those things and told me herself that she only agreed so that she would be able to come back and change my mind over time and that if she has to do what we agreed to she doesn’t want to be in this marriage. After everything that has happened I know there is no rehashing that can be done in this marriage to come to a different conclusion besides ending it. The wound is to big to be patched so the only way to fix it is to sever It’s best for both of us to move on and go our separate ways so we don’t waste each others time and cause each other more pain. I can have her things delivered to her or one of your son in-laws can come pick it up. Salam I have a close friend who sent this message with the intention of divorcing his wife. If they are to get back together do they need to do Nikkah? Jazakallah