[glogla]

Depends.

Teenagers sexting each other?

Someone drawing or 3d modelling fictional underage character?

In many jurisdictions thats the same thing as genuine child abuse base child porn. In my jurisdiction, Harry Potter fanfiction with sex counts as child porn - and as one with extended penalty because it is "delivered through very efficient means like computer network".

Not all things are all the same, even with the same label.