I’m tempted to add to this list, but Sparkle emoji has so clearly become a ubiquitous symbol for “this feature is enhanced by AI”, I’m surprised at the push back from the other commenter.

I’ve never seen or heard anyone mention sparkle emoji as a tell-tail sign of AI generated content, in the way that you hear about em-dash for example.

But I have seen the icon used in just about every website/app that wants to let you know they are using “AI” in some form or another.