As the person who posts the most here my main question is how? I don't have any way to know what was used beyond what is posted on the game's page. Some sites like Steam force disclosure, so anyone interested can just look there. Some like Itch don't even enforce a description of the game so you've got no idea with them!

"AI" is a generic marketing term for a load of different things (for instance you might have different opinions on generating all your graphics compared to translating your game into another language compared to using a code assist compared to cloning an entire game), so a catch-all "uses AI" term isn't necessarily relevant to everyone.

Ultimately if you're posting you've always been free to put as much or as little info in the post description as you like, and to add extra info in the comments if you find something relevant about someone else's post.