I do have something along these lines percolating in my mind, a means which fits within the parameters of Chloe's superpowers.   There is a hint about it in Chapter Three.
I don't know when, or if, that will be added to the story.   In the upcoming chapters, Chloe will be having more dolls come to life.   If Ellie also gains superpowers before those dolls are introduced into the storyline, Chloe would likely anticipate too much potential for conflict and decide against making any additional dolls.