China is still following the same protocols, as is Vietnam, and other SE Asian countries. Pretending otherwise is what ignorant Westerners like to to, in order to promote an anti-mask, FreeDumb, narrative.
The West doesn't consequently quarantine/test travelers* and, of lesser importance, it doesn't mandate contact tracing apps. That's really why it fails to contain the virus as far I can tell.
*In the US you would probably have to restrict interstate travel if contact tracing is done by the states.