I don't believe the Author won't summon Vision. His Presence is the Automatic Cancellation of the Multiverse of Madness. Even if he leaves, he can still convince Wanda to move on with her life instead of trying to win him back
wait is it possible for the ancient one to pop up? that could pretty much solve everything and before the whole, "she doesn't know his identity" thing she saw the future pretty sure she knows Peter Parker.
reading spider man fanfics always has me thinking of this idea that I Had for while, "If Peter Parker Post No Way Home had Rick Sanchez's iq and knowledge and started traveling throughout the marvel multiverse just doing whatever he wants"