An image projected onto a wall, canvas, or piece of paper and subsequently traced can hardly be accurately referred to as a photograph in the way it is understood today.
I’m familiar with camera obscura and while it is a technique which was a precursor leading to the developmint of cameras capable of creating photos, camera obscura itself created images. Images are not photographs. Photographs are tangible prints (not tracings) which can be held in one’s hands and passed on through time.
Unless these images from camera obscura were manually traced onto something tangible, in and of themselves, they would vanish with the passing of the light source.
A tracing does not equal a photograph. Yes, the root word descriptions are related but that doesn’t automatically make them equal.
So, for the sake of strictest accuracy, I guess I will rephrase my initial observation.
The Mona Lisa was copied (traced) from a projected image, not from a photograph (in it’s common understanding of being from the tangible medium of photographic film)