You're probably most familiar with the USB-C to female 3.5mm adapter, which gives you a slot for connecting the male plug on your headphones. But you can also get something like this JMOX USB-C to ...

[octanechicken] has a possible adapter solution that lets you plug-in an older more comfortable ... seems to have fixed that problem. Using a female 2.5 mm stereo inline jack [octanechicken ...

This airline adapter converts a dual-prong airline jack to a standard headphone stereo plug (3.5 mm, 1/8 inch). Plug the headphones cord into the adapter and insert it into the airline jacks to ...