The thing is, that such laws are not global

In some places only material that has hurt children is illegal (even ai gen legal if no CP was used in training) In others it is about the age of the person in the picture including fantasy characters (looking adult but being child - illegal, looking like a child but “250 years old - legal) In others like apparently Australia, it is illegal as soon a someone watching the picture may think the person on the picture is underage

And of course there are many more versions making it difficult to comply for all (some countries eveb have banned porn entirely)