Its classic occult/mind-metaphysics shyt. That's why the title of the episode was "I Am." Its time travel/leaping in the way ppl of that school talk about and write about. Think of time like a giant sphere/ball of water, everything that has happened, could happen and will happen already exists. This includes multiple realities, decisions etc. To become anything you must assume the feeling of being it and the more you can claim and assume that feeling the quicker it happens. This is where that I am comes in. The I am is your base level of consciousness/existence. Before you claim yourself to be anything, you already are "I am." You can't not be aware of being, it's unfathomable. Before this episode Hippolyta was aware of being small/weak wife of George, mother of Diana etc. After this episode (if she shows up again) she has now become aware of her potential, and how that rests on the things she assumes of herself. The things she places after "I am." That's what that entire bit between her and George at the end was about. She became aware of how others were influencing her I am-ness and how this made her shrink herself, and give away her power. This isn't instant though which is which is why we see her having to be trained to be a warrior, loosening herself up to dance and be liberal etc. Those garments are now what she is used to, she had never claimed them in feeling before but now she has, and now she knows she can. This shyt is in the bible brehs. "Let the weak say
I am strong."
Tic has been through the something similar
unconsciously with the whole going to war to get away from his father but also to prove he's not soft.
EDIT: To be clear, it's 100% okay to not fukk with this episode but I think it's clear with the name of the episode and everything with the afro chick to even how Hippolyta "jumped" this is what they were going for/trying to portray. There's a lot going on in this show but I absolutely think black empowerment is a crucial part of it and this stuff was at least a part of black history in the early 20th century (Marcus Garvey was a student of this stuff, this is the kinda shyt he was hinting at with his famous mental slavery line).