I downloaded the Wolfram|Alpha app and made the following question: “If the universe has started with just a command “expand, constrain”, what would be the result after 14 billion years of that command?”
The result was “Wolfram|Alpha cannot interpret the input”.
In this generality a simulation will never run. Possibly you should a least have a look into the WolframModel (the primary arXiv reference for Stephen Wolfram’s foundational paper introducing the Wolfram Model is arXiv:2004.08210.) Papers by Jonathan Gorard and Max Piskunov are also a read. Then please lean back and imagine what could it mean to speak about 14 billion years when the input is “expand, constrain”? A year is the span of time a planet (earth) needs to turn around a star (sun). All this you do not have with “expand, constrain” … you might point to 14 billion cycles or steps of a model, but what model is “expand, constrain”?