Hello! ATOM will probably be out early 2021.
To answer your second question, Demeter is a narcissist. She needs Persephone to rely on her to feel important. She wants Persephone to believe she is the only person in the world who could truly care for her. Demeter does not have the ability to recognize the needs of her daughter nor does she really care. She’s more so envious of the person she is becoming because it means that Sephy no longer needs her, and seeing her power grow reinforces that.
I hope that answers your question!