The webpage reports on a vulnerability in Apple's "Hide My Email" feature which is supposed to hide users' real email addresses, but according to a security researcher and the 404 Media's tests, is often failing to do so. Despite being reported a year ago, Apple has yet to fix this issue. The potential concern is that it may allow attackers to discover hidden email addresses and people-search sites can link these to other personal details.
A vulnerability in Apple’s Hide My Email feature
https://www.404media.co/apple-hide-my-email-vulnerability-reveals-peoples-real-email-addresses/