"And even if some ancient engineer magically did create a simple two stroke engine, there wouldn't be any incentive to invest as to produce them with regularity

"And even if some ancient engineer magically did create a simple two stroke engine, there wouldn't be any incentive to invest as to produce them with regularity. At most, they would've been a curiosity of the wealthy with little usage beyond some minor conveniences." To confirm this, ancient greeks invented a simple steam turbine, and was regarded as a "party trick". https://en.wikipedia.org/wiki/Aeolipile https://en.wikipedia.org/wiki/Aeolipile