This is because the covid-19 measures have been lifted in China and production is running at full speed again. As a result, the manufacturer Foxconn was able to catch up. This means that it is now possible to order the iPhone 14 Pro via the official website and receive it the next day.
While it's good news for consumers, protests late last year show that the situation for workers at Foxconn's factories in China is anything but ideal. The lockdown hit production and Foxconn fell behind schedule. Employees took to the streets to protest the inhumane situation they found themselves in. The situation got so out of hand at the time that employees even came to blows with the local authorities.
Apple CEO Tim Cook remained remarkably quiet about the situation and tried behind the scenes to get production out of China. However, now little has changed and Apple still relies on the factories from the country. While it is nice that consumers have their iPhone 14 Pro at home earlier, it seems to be anything but pleasant work for the employees from those factories. The chance that the situation has turned 180 degrees in the past two months seems to be very small