Strong female lead/No fixed romantic partner/Has a cheat code

This is the story of a ghost that came to life... no, it's been dead for who knows how long. One day, while engrossed in watching two fat orange cats fight, it was accidentally hit by a ball of light falling from the sky and began wandering around various worlds.

[Main American TV series]

world:

Modern Family, Anaconda, Emergency Call, The Walking Dead, Harry Potter, The Immortal, Forensic Doctor, Supernatural, The Gifted, Resident Evil, The Avengers...

P.S.: Although the female lead lived for a very long time, her intelligence didn't increase with her age.

(Just like watching so many movies and TV series doesn't stop the author from being a useless snack)

The female lead is not a god, nor is she a perfect character.