This information comes from MacRumors contributor Aaron Perris, who claimed that Apple's lightning to 3.5mm headphone jack adapter has been listed as “sold out” in Apple Store in the US and most other ...
Wondering what the EU-mandated change from Lightning to USB-C means for your smartphone? The iPhone USB-C switch explained ...
See Lightning connector ... To wire analog headphones people have to USB-C, a Type C-to-3.5mm adapter is used, which contains a digital-to-analog converter. See D/A converter.