Aside from the pigtail USB-C -> 3.5 socket adapters which absolutely do suck, you can also get USB-C -> 3.5 plug cables (link for example purposes only, not an endorsement of amazon or this product) which can be pretty decent length and quality. This, together with headphones with a replaceable cable (also just an example) might open up a few more options for you. Added bonus that if the cable fails it's .. well .. replaceable.
Just be mindful that some manufacturers do the extremely shitty thing of placing the socket on the headphones in a very specifically shaped recess that only their cables will fit.