The ISS is huge. Also, you can't see any detail on the ISS with the naked eye, it just looks like a dot.

Go look at images of the ISS from the ground, the tech for that has gotten a lot better in recent years but there's still not much detail. Consider that the X-37B or China's spaceplane is about the size as a single module on the ISS and you start to understand why there aren't any public pictures of it.

Using large telescopes with special tracking capabilities or on orbit assets capable of taking photos of other satellites would make it possible to get decent imagery, but all that stuff is classified.