Apple's "hide my email" feature is great if you want to prevent tech companies from linking your identity across accounts.

But it won't help you if Apple gets a warrant to turn over you data to the cops.

This is true of any email alias service. If you need anonymity, make a separate account.
https://techcrunch.com/2026/03/30/apple-will-hide-your-email-address-from-apps-and-websites-but-not-cops/