Its funny that you say that since photography was invented in France in that period. Was it the paintings that were photorealistic, or the photos that were painterly?
You can substitute "photorealistic" with "looks like the square (or rectangle) picture in the mirror".
Turns out photographic pictures did capture that "image in the mirror" picture. Funnily enough, using... Mirrors.
> ... or the photos that were painterly?
The answer is simply no. The real world doesn't work like that: photons/mirrors/prisms/our eyes "capturing" photons. Physics vs dialectic if you want.
Reflections in the mirror have depth and motion. Even without the viewer or the subject moving, the viewer can see depth in the mirror that isn't in a photo. In those respects, photos are more like paintings than mirrors. Of course, in other respects, they're more like mirrors.
Tim's Vermeer https://www.imdb.com/title/tt3089388