{author_sort} is a valid name, just no column
You can use that anyplace a template can be used.
Note: if you made the sort the same as the Author, there is no gain .
My personal pref is Author Fn Ln and the sort Ln, Fn
Avoid fudging Calibre metadata to
fix a device issue. Use the templates and plugboard for those
There was a tick box on the Kindle driver to us Author_sort for metadata sent to the K