Intelligent life COULD exist elsewhere in the universe. There’s no reason God wouldn’t create other life somewhere else. (Evolution not a thing.)
Just my opinion, but it appears to me, that God seems to be dealing, specifically with the earth. Do I believe there is other intelligent life out there? Absolutely yes, but the life is angelic, fallen and righteous angels, all over creation, in mortal combat, every moment of every day, I think we would be shocked, if we could see into the spiritual world, and see the warfare going on all around us.
The trouble from a religious angle is, did Jesus die for them also?
I have one reason - Jesus is the only begotten son. Jesus came here to earth, to his Father’s creation and claimed people, then returned home to his Father where He waits. If The Almighty had more than one peoples, people in different galaxies granted the same free will and where He’d still be battling Satan, free-will or no, he’d need more than one son. But He has only The One.