/lit/ - Literature

I've asked this on /his/ and no one seems interested in effort posting there and this is supposedly a smarter version of that board so I'll post it here

Why does it seem like Abrahamic religion talks so little on the idea of what the self is and the nature of reality?

I've been trying to learn about the Dharmic religions, particularly Hinduism and find it fascinating to read and hear about the different arguments and interpretations different sects and religions came up with on the nature of the self, consciousness, reality and existence.

The idea of Hindu Dualism vs Non-Dualism, in particular, I found fascinating and the teachings of Shankara and the idea of "Advaita Vedanta," that there is nothing but existence "Brahman" and conscious experience "Atman" and they are one.

Such ideas in the west seem to be utterly absent in philosophy until the enlightenment and secular philosophers like the classic Desecrate argument, "I think therefore I am."

My question is why did Abrahamic religion never particularly go in-depth on these ideas? All it seems to argue, no matter the denomination or religion, is you have a soul and everything is god's creation and when you die the soul lives on and goes to the afterlife. Do I just not understand the deeper philosophy behind it or is it really that simple and if so why?

Video for anyone interested on Shankara:
https://www.youtube.com/watch?v=GMEsszfBYMo&ab_channel=Let%27sTalkReligion

And vids I watched previously that helped give context
(would recommend watching these first to understand better):
https://www.youtube.com/watch?v=cEqATHUJQHc&ab_channel=Let%27sTalkReligion
https://www.youtube.com/watch?v=5UkDEGBtHSQ&ab_channel=Let%27sTalkReligion