A lot of devs are already lying about AI usage, because the AI disclosure kills engagement even without a filter.
A random example is Soul's Remnant, cute little indie MMO - right before launch they added several major features, and 20+ languages. When questioned about it,, they admitted on their discord to using AI translations... And said they would take down the translations rather than use AI disclosures.
Within 3 weeks they had 10 updates with mile-long patch notes as a team of 2, and they never took put the AI translations or added a disclosure.