Rachel has already done said things, but she is not on the list: 1) sent her astral form across the universe without assistance; 2) created a mini blackhole through her tk; 3) has been shown to be able to exist as a non-corporeal psychic entity that can tranverse time and space after "death" (as Mother Askani).
Also, I'm a broken record on this, I really don't like that Exodus is considered an Omega given that his powers were augmented via Celestial technology via Apocalypse. I do think there could be some alterations to who should be on this list or replace others, but I do commend Hickman for trying to really hone in on a definitive list vs a list of writers pets that casually get added for an arc.