Which, to be fair, could have been brought from Earth to Venus by one of the Soviet probes that landed there and flourished in the upper atmosphere, or have been carried by a chunk of the earth that was knocked loose by the collision of an asteroid on meteorite after organic life has begun on Earth. This is not out of the bounds of probability, pieces of Mars and our moon have been recovered here on Earth.
But I agree that the discovery of life on other planets does not contradict the Bible, it is simply not addressed (or of it is, it is addressed obliquely in some statements that are open to interpretation), any more than the mechanics of internal combustion engines are discussed. The Bible gives us the information anyone needs for salvation; it is not an encyclopedia. The existence of UFOs and aliens, or for that matter vampires and ghosts, isn’t really a salvific issue.
If intelligent life exists on other planets, they could have been saved by Christ’s sacrifice here on Earth, just as human souls in Japan or Britain were saved by an event in 1st century Roman Palestine they did not hear about for centuries - to benefit from Christ’s sacrifice, does it matter whether souls are separated by a several thousand miles or several thousand light years in distance, by two millennia or eons in time? If aliens are unaware of the event, missionary work could be mandated. It is also not out of the bounds of possibility that a resurrected Christ could have appeared to other civilizations on other worlds, as He did to groups on Earth. The old scifi movie “Red Planet Mars” is based on the idea that we may share a theology with alien cultures.
There could also be a local event where Christ was born on that planet, the theology of which is fuzzy but has been used a lot as a theme in science fiction. All these suppositions are not really something that is a pressing concern for us right now, but an interesting topic for speculation
Brother Guy Consolmagno of the Vatican Observatory has written and spoke a lot on the theological implications of life on other planets, I would suggest Googling what he has written.