I mean, for headphones.

I did buy the fairphone 6, and it does in fact work in the US (with some finagling).

The lack of a headphone port is a disappointment, but it's fine as long as you get a GOOD dac. A shitty one will be the worst audio experience you'll ever have. I use this: generic dac (sorry for the Amazon link, I'm sure they're available other places.)

My everyday earbuds are essentially cheap studio monitors. I like these because the sound is great and if the cable breaks I can just replace the $10 cable and keep the high quality headphones. And there's no battery to fuss with, you just plug them in and they work.