It's a large step up from "it's used for job postings in (or closely working with) mainland China", to "it's featured in Apple product announcements targeting a global audience of millions".
Has it been used in an Apple product announcement before? My search is imperfect, but I actually can't find an example (on their /newsroom subdomain).
As recently as two months ago, with the Airphone announcement, they weren't doing this:
2020 - "First, I want to recognize Apple’s family in Greater China. Though the rate of infections has dramatically declined, we know COVID-19’s effects are still being strongly felt. I want to express my deep gratitude to our team in China for their determination and spirit. As of today, all of our stores in Greater China have reopened."
2024 - "Today, Apple has 57 stores in Greater China, with thousands of team members delivering exceptional service and creating magical experiences for customers."
It's not a "loose geographical region". It's usually denotes precisely the PRC (People's Republic of China, including mainland China and the special administrative regions of Hong Kong and Macao) together with the ROC (Republic of China, usually known as Taiwan).
[1] https://careers.microsoft.com/v2/global/en/locations/gcr.htm...
[2] https://www.thinkwithgoogle.com/intl/en-apac/collections/gre...