C.S. Lewis addressed the issue of distant alien life forms accepting salvation through Christ. He raised the question, “What if they were an unfallen species already in complete conformance with Gods laws, would they have the desperate need for a Savior?
We have a hard enough task to remove the beam from our eyes much less speculating on the dust mote in others eyes light years distant. Draw water, chop wood...
I give Lewis credit for imagination but not for what he didn’t do which was to explain how this unfallen race happens to be sitting with the stars about to fall on its head. It would need a reason.
Bible wins here.
I realize there are arguments, but there are many who find those arguments flawed. To them, for example, multiple manifestations of a single Christ would not be a good answer. Christ died once for our sins. He didn't die multiple times for multiple sentient species.
And the old fallback positions "God's way are mysterious" or "We have more important things to worry about in our own lives" may provide personal solace, but these are laughable to those whom we wish to bring closer to Christ.