I just bought a Fairphone 4. I had an iPhone before this, so I bought some headphones with a lightning plug. These are good quality and I would like to use them with the Fairphone, so I bought a USBC lightning adapter.
But the phone does not detect the headphones and puts the audio on the speakers.
Is it possible to detect the lightning headphones on the Fairphone?
USB-C and Lightning are not just simple electrical connections. In fact the Lightning plug of a headphone contains a chip which provides the communication with the smartphone and analog output for the headphone.
If you want to adapt that to USB-C you need an special adapter which translated the Lightning audio data protocol to USB-C like this one by Anker.