In all other cases the listed DisplayPort displays will appear in the Windows Sound panel and no other changes can be made. Click Apply when done. Click Open Windows Sound Settings. The Microsoft Windows Sound panel opens, from which you can configure your system's audio output. Related topic. Set Up Digital Audio
That motherboard appears to have an audio driver, 6.0.1.9250 10/19/21. I do not see a Win 11 OS option yet so it should work. Personally, I would not expect a Beta Bios version would be needed to get an audio device to work, but no way to know for sure. Are there anything other utilities that may get installed?
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