I never had the impression that God ever intended to explain any details of heaven, hell, or the afterlife any more than He intended to explain how He created the universe. Tell us that He did create the universe? Yes. Tell us that there is an afterlife? Yes. Tell us that there are two possible eternal destinies for us in the afterlife? Yes. But not the details of what these are like.
Now why wouldn’t He explain such things? It would seem that having us know such things is, at the very least, not of great importance. He left us a way to discover for ourselves a great deal about how the universe came to be as it was. Perhaps that serves a useful purpose in learning things helpful in life. But there doesn’t seem to be anything comparable for discovering anything about the afterlife. Could it be that dwelling about this doesn’t serve any useful purpose for us? And I wonder if that by itself isn’t a rather important clue. Considering why would that be the case, fires my imagination anyway.