Although, from that TUSBAudio driver Web page you point to:
NOTE: The driver described on this page is not for use by end users. It will not help solve any problems you may experience with a consumer device such as a webcam, camcorder, card reader, external sound card, etc. Thesycon’s device drivers are software components intended to be used by hardware or software manufacturers to create end products.
In any case, you shouldn’t need a third-party driver for Windows 11. Earlier versions of Windows 10 did require such a driver, as UAC2 support was added in Windows 10 release 1703.