Starting later this year, new Sign in with Apple addresses, previously issued on privaterelay.appleid.com, will be issued on private.icloud.com. Existing addresses on privaterelay.appleid.com will continue to work and forward mail to users without interruption.
After further consideration and reviewing community feedback, iCloud+ Hide My Email addresses will remain on icloud.com.
Developers with apps or websites that use Sign in with Apple should ensure that their account systems, email validation logic, and allowlists accept addresses on the new private.icloud.com domain in addition to the existing privaterelay.appleid.com domain.