How can I sort the items by quantity?

What to do if I want sort the items by invenory

On the right of the page, you will be see "Sort by",  scroll down and select "Stock Quantity"

After you select Stock Quantity, click on the little red arrow ( Ascending / Descending)

After you click, products with large inventory in order will display on the 1st page. If you click on the red arrow again, products will sort by less inventory.