Earlier quoted context omitted.
The headphone jack is inside USB-C connector. You can use USB-C-to-3.5mm passive (!) cable to connect your 3.5mm headphones, or you can buy 3.5mm headphones with USB-C audio connection. There's no additional DAC involved, the analog audio is already on a USB-C pins.
How do you charge your phone while listening to music?
https://images.thalia.media/-/BF2000-2000/939d34e30a3d4f6587...