Code-Snippets-Functions/Execute a function on a child site/WooCommerce/stock-quantity-suffix-single-product.txt

add_filter( 'woocommerce_format_stock_quantity', 'wc_stock_quantity_suffix', 9999, 2 );
 
function wc_stock_quantity_suffix( $stock_quantity, $product ) {
    $stock_quantity .= ' m<sup>2</sup>'; // CONCATENATE " m2"
    return $stock_quantity;
}