Creating custom columns or mapping values to columns often leaves sorting column feature unusable. What often happens is people disable sorting on those columns or leave them as separate so it can be sorted.
It would be amazing if you could provide a different value to sortBy or choose the sorting logic (i.e. xx spent (yy%) sort by xx value or sort by yy value or alternative providing a sortValue within a field which will use the default sort functionality based on that value)
Thanks!