Sorting by AlbumArtistSort?

[simbun]

To sort your Albums you'll need something like:
tagOptions: Album.sortTags={Album_Artists_Sort,OriginalDate,Album,Date}

I display the albums in the order they were originally released, and then by their release date (if I also have remasters) so change this as needed.
I include the Album_Artists_Sort in there for when I dive straight into [n] Albums, but again, change to what you need.

Album_Artists should already be sorted by Album_Artists_Sort, are you not seeing that? If you wanted to see the Album_Artists_Sort value be used for the index value too you'd need:
tagValue: Album_Artists.value.sort.index={Album_Artists_Sort}