Chris Stuckmann actually opened his review with that summary and said that they lied. I think that summary is why I thought this movie was supposed to be about the fallout from the No Way Home spell.
This is the highly misleading official synopsis for this movie:
"Dr. Stephen Strange casts a forbidden spell that opens the doorway to the multiverse, including alternate versions of himself, whose threat to humanity is too great for the combined forces of Strange, Wong, and Wanda Maximoff."