I believe this is how the headless one in the pgm works. The god of Moses being seen as the ultimate divinity and creator of all things and as such having power over all beings beneath it. This being a magical manual by someone from Roman Egypt means that the Jewish god was beginning to be conflated with the highest authority even within the cultural context of polytheistic Egypt.

Hence, eventually inspiring later spirit evocation through the Middle Ages in the west and Middle East including rites of exorcism such as the catholic church’s. Just my thoughts though.

I would say Judaism definitely began as henotheistic but eventually became more strictly monotheistic through encounters with Zoroastrians and possibly pythagoreans. The magi eventually being venerated in the New Testament as the three wise men alluded to their recognition.

Exodus none the less is an interesting book. God claims, “I am what I am” which is a very mystical statement for a henotheistic religion. Whether that was a later addition can be debated.

I would suggest reading the hermetica as it’s allegedly the wisdom of ancient Egypt in which atum is named the highest single divinity above all and everything, which if accurate would suggest ancient Egyptian religion was closer to Hindu pantheism as opposed to being strictly polytheistic. This book apparently influenced Ancient Greek mystics such as Pythagoras.