From what I recall, Animus works in the following way.

X has an ancestor, Y. X and Y share genetic material. X can access Y's memory through the Animus simulation.

In Assassin's Creed: Valhalla, near the endgame, a certain person, (I do not want to mention names since I am afraid of giving out spoilers) after the Brother’s Keeper mission uses the Animus and simulates a memory of Eivor.

How is that possible? The original user has genes common with Eivor, being his descendant, but the new user does not.

Question: Can you use the Animus to access memories of another person you are not descended from?