I know that if we report AI-generated texts or content to moderators, they get deleted, and I also know that there is a thread for reporting AI-generated posts (I'm unable to find that thread at the moment, sorry), but, shouldn't there be an official rule in the
unofficial list of forum rules against obvious AI-generated content and posts?
You mean you want an official rule for AI-generated content when the forum itself does not have an official rule that governs anything but unofficial ones?

Regardless, I believe there is a reason for that, nevertheless, it's a good call to distinctively define the forum's view on AI-generated content.
For me, I am confused about this and might be the reason why the forum is silent about it after many reports about it. AI is being used in this advanced age where even reputable companies and educational sectors are mastering its work. Are they not? So, to take a side here is so technical. It's good that moderators have been doing a great job about it at their discretion and it's our duty to report more of such content that we suspect and give moderators the judgmental doubt to deliver the right verdict.