<DataGrid
  columns={columns}
  rows={rows}
  initialState={{
    sorting: { sortModel: [{ field: 'name', sort: 'asc' }] },
  }}
  slots={{
    columnSortedDescendingIcon: SortedDescendingIcon,
    columnSortedAscendingIcon: SortedAscendingIcon,
    columnUnsortedIcon: UnsortedIcon,
  }}
/>