For the plus 20 years, Apple has manufactured the vast majority of their stuff in China. Obviously they haven’t been alone in doing this, most major tech companies and many smaller ones have either moved their factories to China or gotten started there. The pandemic showed that this was a risky move as China essentially shut their entire country down for a long time, disrupting supply chains everywhere. Apple and now many others are beginning to rethink this strategy and have begun diversifying their manufacturing to other countries in the region as well.