Lockdown mode: https://support.apple.com/en-us/105120
Advanced Data Protection for iCloud: https://support.apple.com/en-us/108756
Besides, they fully comply with Chinese requirements, so...
PS. Others report Filevault keys are also being backed to iCloud since September and they didn't tell anyone: https://sixcolors.com/post/2025/09/filevault-on-macos-tahoe-...
And if you don't want iCloud Keychain, you are still given the choice to encrypt and print the backup key.
Unless Apple is straight up lying about their technology and encryption methods used to secure iCloud and their hardware, the issue of a public standoff is moot, because Apple couldn't help them if they wanted to. And while perhaps it's possible that Apple would lie to consumers to please US law enforcement, it's a bit of a stretch to say that because there haven't been any high-profile cases where law enforcement tries to force Apple to give up what they don't have, that this must be evidence that they're in cahoots.
Which, to be clear, is perfectly possible. Apple has denied the existence of a deliberately backdoored system at least once before: https://arstechnica.com/tech-policy/2023/12/apple-admits-to-...
Apple has since confirmed in a statement provided to Ars that the US federal government “prohibited” the company “from sharing any information,” but now that Wyden has outed the feds, Apple has updated its transparency reporting and will “detail these kinds of requests” in a separate section on push notifications in its next report.