So. The disclosure question answers finally show up in the info box. And it links to the real filters, it seems.
https://itch.io/games/ai-assisted
https://itch.io/games/ai-audio
https://itch.io/games/ai-graphics
About 15k assets still not answered the question, so the grace period is not over, it seems.
The area seems to be named Content, if no ai was used (but still talks about ai) or AI Disclosure, if there was.
Seeing the info that no ai was used in all game info boxes, just because they did not use it, is odd. It is a bit like seeing a non mature warning on a non mature game. It should be the expected way, so only give information, if there is information to give, like the rest of the things in the more information box. There is also not information about how a game did not use Unity for example. Only if it did.
Steam does it like that. They will only display info about ai, if ai was used. They will not advertise on a game page, that no ai was used.
I think the real issue or non issue is, what will people that do not read the message board (most of them), think about the new information there. Will they understand what it means. Will they be annoyed by the constant reminder that games did not use ai and see it as an advertisement for the no-ai tag. Things like that.