Except in the case of pornography, it’s an open question if viewing it has a net increase or decrease in sexual desire.
With legal pornography, it’s typically correlated with higher sexual desire. This tracks intuitively, since the existence of pornography does not typically seem to line up with a drop in people looking for romantic partners.
There’s little reason to believe it works the other way around for people attracted to children.
What’s unknown is if that desire is enough to outweigh the legal consequences they’re aware of, or any social or ethical boundaries present.
Studies have been done, but finding people outside of the legal system who abuse children is exceptionally difficult, even before the ethical obligation to report them to the police would trash the study.
So the studies end up focusing either on people actively seeking treatment for unwanted impulses (less likely to show a correlation), or people engaged with the legal system in some capacity (more likely to show correlation).