In principle there could be images about the invention of writing. The intersection of "those images existed", "they have been preserved", "we find them" and "we interpret them correctly" is however tiny

Even written records of oral history of the invention of writing would work

The bigger issue might be that "the invention of writing" is a rather boring and gradual event. Some administrator starts tracking the state of their grain stores with some symbols, then they start tracking other things and need symbols to differentiate, and over time more and more meaning is encoded in those symbols, until we call it writing