Well, God said he put man on this earth - not earths. I’m just reading the bible (again), and from what it looks like, Jesus only came to this earth. God is not going to make a planet full of beings that have no chance to hear about Jesus, and then be condemned to hell.
We are the only planet with life.
And I’m not limiting God - I don’t even pretend to understand God. I’m just reading His words, and putting them into the context I can understand.