Odd. You can get it from aliexpress for something like €50.

I use a separate usb adapter to the earphones. iBasso dc03 has separate usb c cable that I’ve been able to replace when the original broke. Cheap replacement rather than tossing the whole thing away.

For earphones, I use kefine delci as they’re comfortable for my ears and sound good enough. When the cable eventually breaks, a new pair is cheaper and the earphones can still be used.