Got it working on Big Sur Public release...
You need the older version, I got v2.16.0 installed and working with this steps.
The newer beta release from ASIX (v2.19.0) did not have the pop up from the system privacy and would need you to disable kext.
Resolved:
Download new driver from asix revision v2.18.0 and install
Boot MacBook in recovery mode
In Terminal: /usr/sbin/spctl kext-consent add 5RHFAZ9D4P
Start MacOs X and accept pop up in system preferences/security and privacy. All works.
Dartanian_001
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