Is flow something intractable from the connection-forming complexity of an experience, or just a biochemical reaction to an experience the brain considers compl

Is flow something intractable from the connection-forming complexity of an experience, or just a biochemical reaction to an experience the brain considers complex, immersive and valuable? As such, could the subjective experience of flow be simulated via a mixture of hormones/chemicals? If so, is any aim for a human just a task of simulating what seems a sufficiently valuable, non-hedonistic but ultimately some sort of balanced-nice-sounding-definition-of-happiness maximizing experience?