Audio / video playback of .asf files is still supported on vlc.
To test it I downloaded a couple of sample files with audio in .asf format from this site:
https://filesamples.com/formats/asf
While there isn't a problem with audio / video playback the video output is pixelated. I tried converting to mp4, but that didn't resolve the problem. Disabling hardware-accelerated decoding didn't fix it either. Neither did changing the output module.
Here's a pix to demonstrate that audio / video playback of .asf files works albeit with the pixelated output. The file is the top one in the list on the above mentioned site.
(click to enlarge)