I think discussion of the simulation has to involve discussion of the nature of light
We are told light is electric and magnetic fields vibrating in the nothingness of space. But the fields are said to be force fields. and the definition of a force is that which causes motion of matter (force = mass x acceleration -Newton) So space has to contain particles of some sort which move for the electric and magnetic force fields to exist. The ancient Greeks knew this to be true and they called the particles the Aether , the 5th element. Light is motion of the Aether, the existence of which is denied by modern science.
The double slit experiment gives a clue as to how the simulation works. When a light wave is passed through 2 slits the wave beyond the slits forms a diffraction pattern.
There are lots of videos on You tube about this. The videos go on to say that when the waves are 'observed' the waves become particles.- matter. Never is it said how you can 'observe' a light wave. If you think about it the light would have to emit light from itself for you to observe it - that's impossible. What actually causes light to become matter , I think, is human consciousness and I have found the mention of this on the internet.
Our consciousnesses are creating the material world from another world which consists of light. We perceive our own bodies as solid matter when in true reality we are light beings.