Don’t get me wrong. Apple removing audio jack was the biggest facepalm in smartphone history. And you can thank it for not being able to make an upgrade without sacrificing audio jack (and SD card too :/). But USB-C is getting standardized everywhere now (laptops, smartphones, etc.). What makes USB-C earphones not worth the switch?
If they mean what I think they do… There are Bluetooth ->3.5 “adapters”… E.g. Bluetooth source (phone), analog output (headphones). Logitech has/had one and it works well.