I don't think seeing faces in things (pareidolia) is an example of simulacrum, I might be wrong though, it's been almost a decade since I read the book, there might be something about faces in there.
I saw :3 on page 3
I didn't even see what it was supposed to be until she pointed it out, and even then I feel like what it's supposed to be is a bit of a stretch
But maybe that's just me
I don't think seeing faces in things (pareidolia) is an example of simulacrum, I might be wrong though, it's been almost a decade since I read the book, there might be something about faces in there.