Earlier quoted context omitted.
I personally didn't find the lack of 3.5 mm jack to be as big of an issue as I thought it will be. I just attached the USB-C-to-3.5mm adapter that came in the box to the headphone cable and forgot about it.
Do you know if these converters are device specific or can I plug them into any USB-C port on any computer and have sound come out of my headphones.
The alternative is an active device, with its own DAC and amplifier. This is more likely to work with all your devices; I'm pretty sure I could connect my desktop computer's external USB headphone amp to my android phone and it'd just work.
Details: https://www.soundguys.com/usb-audio-explained-18563/ https://www.androidcentral.com/usb-c-audio