So, when Multiverse Of Madness came out and confirmed that all copies of the Darkhold were copied from the walls of Mount Wundagore, I thought that the book in Agents Of S.H.I.E.L.D. and Runaways was just a different copy than the one seen in WandaVision and Multiverse Of Madness. However, some have said that since the Darkhold can change its appearance, show different people what they want to know in their mother tongue, etc. , it could still be the same copy of the book, and personally, I think that's a cool idea, and it does make sense.

Also, before some idiot says that the latter is false because all the copies of the Darkhold we've seen in Marvel Studios media (which, by the way, is two) look the same, using that same logic, a Doctor Strange variant who looks like Peter Hooten cannot exist at all because we've only seen those who look like Benedict Cumberbatch. (TBF that doesn't really apply here since Multiverse Logic vs. Book changing its appearance.)
Is the Darkhold from WandaVision the same copy or a different copy than the one in Agents Of S.H.I.E.L.D.