The Bible just isn’t a technical manual of the universe. I don’t see any evidence that it attempts to explain anything at all “off planet”. It didn’t even attempt to explain anything in detail about this planet either. No chemistry. No physics. No biology. Nada. The Bible simply wasn’t meant to be used in that manner.
But I do agree, it was written specifically as a hardstop letter to from God to Humans with his spirit sent to help us and guide us and to convicts us when necessary. God has otherwise revealed little outside our own sphere or realm other than to tell us of conflicts in the heavenly places. We know of a change and remaking coming of all of creation but the Bible was written with humans in mind.
The Bible doesn’t say there are other beings on other worlds but it doesn’t say that there are not. Daniel did say that in the latter days knowledge would increase. That may include knowledge of other life. And specukation is what we are stuck with right now until God and time reveals more.
Peace to you!