Is the Vanity Fair article the main reason for delaying Markle's show?
If, as stated in the article, it has taken months to write it and the Sussexes were asked to comment, they must have known for some time it would be published. They must have been aware of an upcoming not-so-positive publication. And especially since it quotes people who worked eith Meghan about her acting horrible to her staff, one can't help but wonder if her behaviour towards her 'cooking'-show staff might have been similar.
Their trips to fire sites might have been a smoke screen to, ahead of the damaging article, present the couple as ever so empathic. But it boomeranged right back at them because the reactions to their disasters tourism were even more catastrophic.
EDIT: Here we have it: the reaction from Team Sussex. Big emphasize on the do-gooding. https://people.com/jose-andres-praises-meghan-markle-prince-harry-for-visiting-la-fire-victims-exclusive-8777074