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 after the "Brother’s Keeper" mission, a certain person uses the Animus and simulates a memory of Eivor.
How is that possible? The original user has genes common with Eivor, being his/her descendant, but the new user does not.
Question: Can you use the Animus to access memories of another person you are not descended from How is that possible?