First of all, if there were other souls out there, God is a liar, because He does not show favoritism. He told us to preach the gospel to every creature- therefore He would have had to have prevented us from obeying Him, or created aliens to live so long that we could someday bring them the gospel- which is different from how long He lets us live (favoritism).
Even if that were so, there’s still favoritism because God so loved the world (singular not plural), aliens would say “Why didn’t God love our world enough to die for us and Bri g us the gospel? Also God would be made out to be a liar because He says He shares His business with His friends. So telling us of heaven and hell, of angels and demons, of creation and history, but leaving out aliens would mean He doesn’t consider us His friends, His loved ones, His children.
But let’s say there are aliens who made us. They would have to be so so wise to create the human body, with all its wonders that we are still discovering. “I am fearfully and wonderfully made.” means Whoever created such a masterpiece as the functioning human body is Someone to be greatly feared and admired! This Being, or Beings would have to get everything perfectly right- which means that Being would have to be capable of never lying. So if an unknown Being created us, either They are lying or God is lying.
Whichever angle you look at it, it makes no sense whatsoever.