Using the 2423 BIOS, the B550-E, and Windows 11, I can confirm the Windows 10 drivers audio drivers work for the USB 2.0 type-C audio port (and the included type-C to 3.5mm adapter). I didn't think I'd have a use for this feature, but first impressions are great. Would love to see this feature on future boards.
Asus, please update the drivers page for B550 boards with the USB type-C audio jack.
AMD Ryzen R9 5900X
ASUS ROG Strix B550-E (the worst motherboard I've owned in 25 years)
Corsair H150i Pro XT 360mm
32GB Corsair VENGEANGE LPX 3600MHz CL18
EVGA RTX 3080 FTW Hybrid w/ 280mm radiator
M.2 WD 1TB SN550 | 2 * WD Blue 1TB SATA | 2 * Toshiba N300 8TB | 400TB on a 48-bay Supermicro server
Fractal Meshify 2
Microsoft Windows 11 Pro