Is it ok to ask for how to find original soundtracks of rock or pop music? For example, Lou Reed Perfect Day. This is fairly easy for classical music, in other music there is still scores but they are different, not only in terms of tonality but sheer notes.
My impression is that a broad question asking how one can go about finding sheet music for rock / pop music in general can work.
A question about whether a certain sheet music exists might be on-topic since it can potentially be answered with a clear yes / no, but that does not seem to be the kind of question you're focussed on.