I don't think Wanda created the Hex at all nor did she actually resurrect Vision. She got trapped in an illusion created by someone else and at one point started to play along, because it seemed to be her chance to have her happy life. I'm not even sure Vision is completely real and 'alive'. If she was able to set up the Hex, bring all those people under her control and make all of their relatives and friends forget they ever existed, why didn't she just do the same with Hayward and his cronies in regards to Vision?
And I'm focused on the mindstone, because Wanda's powers came from the mindstone in the MCU, even if they look nothing like it and more like the powers she has in the comics. And the mindstone was also what made Wanda and Vision connect on such a deep level, because their connection was really kind of on a cosmic level and her understanding of it and their resonance with each other was what made it possible for her to destroy it. The real Vision can only be recreated if he gets the mindstone back, even if only on a lower level maybe. Every other power she might use would change Vision into something new.
But as I said, I don't think she is the one actually making Vision walk around, but the one who created the Hex and from the moment she gets pregnant Agatha is trying to turn Wanda and Vision against each other, because they now have a new hold on Wanda and need Vision to antagonize her, so she has no one to turn to anymore but Agatha (and whoever it is behind her), once the attack from the outside comes.