Earlier quoted context omitted.
They're still trying to get back in. See project Dragonfly for example.
Strawman. A large chunk of Apple's revenue comes from China. The majority of assembly occurs in China. Google does a rounding error of business in China - assembly for Nest devices.
The most convincing article I found was an un-sourced piece from "hothardware" (and nothing shouts legitimacy in a source than a name like that) which says that only the budget pixel phones were actually moved to Vietnam, the high end versions are still in China.
As such, I have to assume that their production is still largely occurring in China.
I wouldn't mind being proven wrong though.
As a side note about the strawman accusation; pointing out Google's attempts to re-enter the lucrative Chinese market when the parent is using their absence to justify the position of "Google's Better" is absolutely relevant.