I recently came across a description of how the Quran might justify or accommodate an ET reality that is more detailed than one I posted earlier. Click on this link and scroll down a bit. This one isn’t focused on the Jinn.
Extraterrestrials in the Quran, Part 2

What’s your general opinion on this?
I think the Quran *can* be interpreted as such.
Just for comparison, where would you rank the Quran with other extra-biblical writings in terms of ‘possible authority’ to speak on the nature of the spiritual world and its entities, like the book of Enoch and texts of ancient India, etc?
pretty low; so much of it is taken from the Hebrew Bible and New Testament and spun in the direction of Mohammedism (Islam). It ranges from spun plagiarism to its writer’s own beliefs (many of which I think are anything but laudatory), to being a somewhat useful window on Middle Eastern culture.