Making a product in-stock & out of stock filter
WooCommerce product stock filter tutorial
Product stock status in WooCommerce is stored in the _stock_status private custom field, which can have two values: instock and outofstock
On the search instance Frontend Search Settings -> Custom field filters panel you can easily make a filter on this field:
..this will result in:

Detailed Instructions

    To the Custom Field input enter: _stock_status
    In this example I use the Radio type, but Checkboxes or Drop-down is just as good
    To the values textarea enter:
    1
    ||Any value**
    2
    instock||In stock
    3
    outofstock||Out of stock
    Copied!
For more information about custom field filters please visit the Custom Field Filters documentation.
Last modified 1yr ago
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