History
Cable shared a similar history to his Prime Universe counterpart. It was revealed to the Defenders that Cable and multiple other superbeings occurred on Earth because the Omegas had collected the ideas of beings from across the Multiverse and created the Concordance Engines to help mold the Earth to bring them all into one place to prevent the destruction of the universe by the Death Celestials.[1]
Notes
The idea of this character's power occurring on Earth being caused by the Concordance Engines is also likely to be true on Earth-616, as the divergence is only the engines are not discovered. However, there hasn't been a story exploring this.