Well, I have followed everything PeterT generously outlined but no "Finished" shelf appears nor are there any entries listed under Custom Columns created in Calibre (v.9.34). I have double-checked all entries and confirmed that "auto management" of metadata is selected.
Also, when the Aura is connected these three options of the driver are grayed out:
Change Reading Status in device library
Manage Series information in device library
Show books not in the device database
There is something I am missing -- but I've no idea what it is. Any ideas?