While the privacy around ai chatbots is rotten in general, I can’t fault anyone who reported this.
They shouldn’t be in a position to report it at all.
The 3rd Party Doctrine destroyed the 4th amendment and is the reason privacy respecting software has to play legal games. E2EE while a good security practice shouldn't be necessary to protect you against the cops rummaging around your stuff. The bar to establish that information is private shouldn't be "literally mathematically inaccessible but the cops are still allowed to try."