Why Was Vision Not Seen in Other Universes?
Nothing happens by chance in the movie industry. In Doctor Strange 2, none of the alternate dimensions included vision. Wanda wanted nothing more than to reunite with her children, but they were never seen with Vision, who was their biological father in WandaVision. And Olsen told Collider that it was decided that her character would only look for a world where she and her kids lived.
The couple parted ways. They’re physically split up. There’s a good reason she isn’t sporting a wedding band. I’m into that sort of thing. We thought it was cool that she was going out by herself. This is Elizabeth Olsen, by the way.
If Wanda’s scheme had been successful, she might have been forced to replace her variant and become the mother of her boys. Wanda probably decided to leave home without Vision so she wouldn’t have to choose between her parents. Vision is a powerful and intelligent being, after all. It’s possible that if he realized that someone else was using his Wanda, he would have taken revenge. Wanda had a difficult enough time putting an end to Vision in Avengers: Infinity War. It might have hurt even more to have to do it again, this time as an adversary her beloved didn’t know about. In addition, Wanda may have matured enough since the loss of her Vision to realize that she may never find the same love from any variation again. To her, it would be nothing more than a facsimile of what she previously had. While she never considered her sons to be genuine people, she understood that they might as well be if she were to eliminate their biological mother.

