My Google account confirms that I'm over 18, but it's not showing NSFW content.

It's obviously a Google account that has been verified that you're over 18. There seems to be an error on this site.

Hi, you need to review your account settings on Civitai - there's no link between your Google account settings and Civitai.

We now have more fine-tuneable options for content;

Thanks!

no mistake, it's just that the new age of Civitai has arrived