I think one of the best ways to show the problem with misinformation being so widely spread on Twitter is the fact that someone can post inherently flawed or outright false representations of the law and get thousands of retweets, but an attempt to clarify gets mostly ignored.
Anything referencing the PROTECT Act in order to say that depictions of fictional minors sexually are illegal is inherently false. This aspect of the PROTECT Act was deemed unconstitutional, and current laws around the subject are implicitly against criminalization over drawings.
Art is not considered CSEM materials by the law anywhere in the United States. It is a victimless crime so to speak, and if it WERE to be considered a crime it would waste federal resources dedicated to actual children who need their help.
Please keep in mind always that the fight against CSEM is outrageously understaffed and filled with people who have seen some of the worst crimes imaginable. It's a field with a high turnover rate and an extremely difficult position to fill.
You're essentially asking an overworked, highly traumatized, and understaffed force to take on more work and dedicate time to stopping a crime with no actual victims. To have to take time away from helping victims of CSEM to "help" fictional characters.
They already can't help most victims of CSEM due to the nature of how hard it is to keep people on WITHOUT people flooding them with misguided reports. I ask this genuinely: can you really feel okay reporting Lolisho as CSEM knowing that that takes time away from real children?