Does that mean there is more than one tree in the midst of more than one Garden, a tree of immortality?
Even beings with tens of thousands of years lifetimes would find travel at sub-light speed to be booooring to go through just to come here. If they’re coming, there must be another trick.
I have no reason to believe that an omnipotent Creator would not limit himself to one "world." While I believe humanity and the human experience are unique, I don't think that precludes other races, beings, creatures, etc. from having been called into existence (and in that regard, perhaps my use of the term "human beings" in a previous post was inappropriate). Certainly, I would think that the GOD who saw fit to reveal himself to his creatures on this planet would not see fit to commune with his beings on another planet (or universe for that matter).
Lewis presents the hypothetical fictionally in his "Space Trilogy," then discusses it in more serious terms in (at least) one of his other tomes, although exactly which one, I don't specifically recall at the moment.