Ok
Listen for a clear understanding
For example, I bet We’ve all seen a photo of a baby’s bare butt before. Those photos aren’t considered obscene or cp because it’s not sexually explicit, it’s just a baby’s butt.
For cases like anime in this, most people do not refer to it as loli, loli hentai or anything related, but just… idk, like any other photo of a child
Technically, it’s not illegal if nothing is shown in a sexual way, or if there’s sexual engagement, and there are no private parts being shown. (For teenage woman, there may be exceptions because, ya know.)
This is what most law documents mean by it being legal if it’s not obscene
Also for another thing you said somewhere else about being able to find photos or drawings of people who look 16 in phub, that could possibly be because in some countries like the UK, the age of consent is 16. That would be my only explanation.