One more accessory that has been removed from the iPhone 12 box, is the EarPods. The reasoning is the same. The iPhone 12 works with existing Earpods, Airpods, and other Bluetooth headphones/earphones as well. So, once again, adding one more pair of EarPods seems counterproductive.
With the two elements removed from the box, Apple has predicted that they will be eliminating almost 2 million metric tons of carbon emissions annually, which is roughly equal to 4,50,000 fewer cars on the road per year.
This has also resulted in a more compact packaging size, and as such, Apple can now fit in more inventory and cater to a much bigger demand, thereby given them a larger footprint in the market.