That’s just because there’s no Chinese Snowden yet. What do you know about surveillance in Asia? If you’re here speaking English I reckon you know nothing.
There are tons of well documented cases of China straight up mass MITMing their citizen's traffic. And this is legally authorized under their law.
In 2014 they MITM'd iCloud. In 2018 they simply required Apple to hand over iCloud to a local state-owned company. Apple no longer controls iCloud in China, the Guizhou government does.
I don't think the surveillance in China is even remotely comparable to anything that has ever happened in the US.