Carrie Bradshaw's arc on And Just Like That… focused on grief after losing the love of her life, John "Big" Preston. When she was finally ready to move on, Season 2 introduced another big love in her life -- her former fiancé, Aidan Shaw. While there were many instances where the Sex and the City revival show didn't honor the original characters, what shocked audiences most was the show's attempt to dismiss Big as Carrie's true soulmate and portray Aidan as Carrie's endgame.
Source:https://www.cbr.com/carrie-aidan-end-up-together-and-just-like-that/