It’s true iCloud has separate Chinese servers, but many of my friends (probably everyone who cares about privacy) in China know how to set up an Apple ID account with its country/region outside mainland China (HK, Japan, US, UK…) and use that for their Apple devices, it works like a back door: download/upload speed might be slower but most privacy features are accessible, and all apps that PRC gov doesn’t like can then be found on the App Store including VPN, which is the basic tool for internet freedom here. iMessages is also available, it is among the very few legal messenger apps that are not continuously monitored by gov in China. Google left China saying they don’t like cooperating with PRC gov, and you may think they are brave guys, but that action also leaves millions of Android users in China who are much harder to enjoy free internet and privacy as there’s no Google to give them handy tools there.