In Australia cartoon child porn is enforced in the same way as actual child porn. Not that it answers your question but it’s interesting.
I’d imagine for your question “it depends”, some people who would have acted on their urges may get their jollies from AI child porn, others who have never considered being pedophiles might find the AI child porn (assuming legal) and realise it’s something they were into.
I guess it may lower the production of real child porn which feels like a good thing. I’d hazard a guess that there are way more child porn viewers than child abusers.