My USB-C to headphone jack dongle carried its last waveform and before I recycled it I decided to do a quick teardown to see what's inside since I've always been curious.

You can save yourself some time by just looking at this teardown article. I came across it when I searched the name of one of the IC's inside. Perhaps I should have just done a search before tearing down, but where's the fun in that?: https://www.cabledo.com/google-usb-c-digital-to-3-5-mm-headphone-adapter-disassembly/