Yes, in the sense that even the Chinese no-name parts do have to comply to some kind of standard.

The selling point with lines like STM32 or NXP is that they have lots of good documentation, Application notes etc.

Simple example, I was looking at trying a weird Chinese part with a hardware NN accelerator but the entire documentation available (Chinese or English) was 10x shorter than the documentation on the serial peripherals alone on an NXP part.