Ok so this is probably the most specific question ever, but i always have those very random questions so let me share with y'all:

In MoM, we learned about the Gap Junction, a place that holds the Book of Vishanti, and exists "in between" universes (so it's kinda like it exists outside of the Multiverse).

When Wanda destroyed the Book of Vishanti, that technically affects the entire Multiverse, since anyone that goes there in the entire Multiverse will found the empty place with the Book destroyed.

So what would happen if someone goes back in time, and then goes to the Gap Junction? Will it still be affected by the events of MoM?

Same logic applies to going back in time and getting a Darkhold after Wanda destroyed all of them in the entire Multiverse.