The ability to type to Siri has actually been available on Apple devices for several years now, but previously it was hidden away in the Accessibility settings and not all that easy to find.
Usually followed by instructions on how to disable this in the settings. The trigger for the warnings is the so-called "App access for Apple Intelligence and Siri", which Apple has in fact ...
To disable Apple Intelligence, users will need to navigate to the Apple Intelligence & Siri Settings pane and turn off the Apple Intelligence toggle. This will disable Apple Intelligence features ...
For users concerned about privacy, Siri can be disabled through device settings. On iOS devices, users can go to Settings > Siri > Talk to Siri > Off, and turn off “Press Home for Siri” or ...