Another central concept that says "Everything is Maya", hints at the idea that there is no absolute reality, and is very close to the simulation hypothesis..
Another one is the concept of 'Omkaaram' which is supposed to be a primordal "sound" or sensation from which all the universe was created, which can be thought of as saying that all reality emerges from consciousness..[1]
The stuff in Vedas and how it got written are really really intriguing.