In France, the government is concerned about children and adults getting RF radiation from holding an iPhone to their ear
In France, there is concern that smartphones bombard the brain with radio-frequency energy. As a result, there is a law on the books in France that says users should be encouraged not to hold their phones against the sides of their heads, especially children 14 and under. As a result, shipping wired earbuds in the box with the iPhone like Apple used to do in the good old days is supposed to encourage French children to stay away from soaking in those controversial RF waves.
Outside of France, the iPhone box includes only a Lightning to USB-C cable
Outside of France, iPhone boxes only come with a Lightning to USB-C cable. Apple stunned many by removing the charger from the iPhone 12 box last year along with the EarPods. Apple did this to reduce carbon emissions and leads to reduced use of rare-earth elements. Apple hopes to be completely carbon neutral by 2030. In the meantime, Apple would prefer that you reuse your charger from past iPhone models or purchase new ones from the Apple Store.