Yeah back in 2019.

Countries responded and I don’t think it went anywhere.

Here’s the US response

In the United States, federal law provides that it is illegal to create, possess, or distribute a visual depiction of any kind, including a drawing, cartoon, sculpture or painting, that depicts a minor engaging in sexually explicit conduct and is obscene. However, visual depictions (CGI, anime, etc.) where there is not a “real” child are typically protected by the First Amendment (unless the visual depictions are obscene)

Japan

Japan therefore proposes to exclude “audio representations” and “written or printed materials” from the third sentence of paragraph 61. "Furthermore, for the reasons explained above, whether criminal penalties should be imposed, even if the case involves pornography of a non-existent child, it needs to be carefully considered. Japan proposes to add “to the extent that it represents an existing child” at the end of paragraph 61.