Lightroom Classic/CC: need to adjust/mute/remove audio from video files

I realize LR Classic/CC is focused on photos, but it does allow one to import, organize, and export short video clips.  It has only two real options for editing video: trim, and set poster frame.  But it provides no means to edit the audio track of these video files!  Please add, at a minimum, the ability to mute (or remove) the audio track.  Even better, to mute or adjust the volume.  Better still, to adjust volume plus add a brief fade-in at the start and fade-out at the end.  Note that this feature, like trimming, is not about slide shows - it's a non-destructive change to the video within the catalog, which will be applied when the video is exported, used in a slideshow, uploaded to SmugMug via plug-in, etc.