You likely live in an area that isn't one of their first targets for the rollout. I bet mask usage was also slower on the uptake there, but has increased over time.

They don't need to impose it globally overnight. They'll get a foothold with it, then slowly expand it as they get the opportunity. It's already in place in several countries around the world, and cities in the US. It's certainly possible that their efforts fail, but they know the strategy they need to use to make them succeed, and they're on that path.