Out of the blue, Apple IDs have been locked with no explanation, requiring new passwords before the iPhone, iPad or Mac could be used again.
This is a companion discussion topic for the original entry at https://www.forbes.com/sites/davidphelan/2024/04/27/apple-iphone-ipad-mac-users-abruptly-locked-out-of-devices-reset-required-iphone-15-pro-max-password-mysterious-issue/