Even without an optical port, you can still get great sound.
The Astro A50 and Astro A40 are two of the best and most popular gaming headsets for the Xbox One, and Astro has committed to making it as easy as possible to also use them on the Xbox Series X or Xbox Series S. However, since the new consoles lack the optical port that has traditionally been part of all of Microsoft's systems, you'll need to update Astro A50 and A40 headsets so you use them through the USB or the 3.5mm port on the Xbox controller.
Full story from the WindowsCentral blog...