It is my contention that as God continues to work through human hearts and imagination our understanding of His nature becomes clearer and more focused
And you are welcome to that viewpoint. My contention as a non-believer is that these are merely compendiums of different stories being cobbled together from various sources.
I looked through a number of translations and I couldn’t find one that is like yours which actually mentioned Tartarus by name. However, I can see that the implication is there regardless
My suspicion is that the direct reference was removed in later writings. The original bible was actually written in Greek, so it should not be at all surprising that a Greek word and reference to their pagan lore would be discovered.