Cp IS extremely harmful, I think no one is denying that.
The point is: what do you consider cp?
Are there any children (REAL CHILDREN) involved in any of this? No.
No child was harmed in the making of this fictional product.
I also seriously doubt that these kind of product are what interest pedophiles, this is no shotacon/lolicon.
This is a comic about 2 older teens (around 18, so technically not even minors but whatevs) in a consensual relationship , with a target audience in a similar age range as the protagonists in the story because WOOOOAH incredible, teens have sex and sexual fantasies sometimes! Scandalous.
Jokes aside...
the graphic depiction of the character is the same as any other generic bl: they look young in the same exact way other bl protagonist looks young, even if a different age is stated by the author... try comparing the design of these 2 to any of the characters in stuff you read.
Take for example a webcomic i can see on "I already read” list: The bottom in " Don't mess with my puppy", he looks young af, the only difference is that it's stated to be in his 20s in the story.
(AND OMG HE'S A PUPPY! GOTTA BE CAREFUL, YOU ARE FEEDING INTO ZOOPHILES FETISHES /j)
Can you consider this problematic? Sure.
But I think you are barking at the wrong tree here.

Holy child porn, how can y’all enjoy this when they’re clearly minors.
(Yall who are coming at me and defending this shit are disgusting, please touch some grass and take a shower)