Modify Maximum Quantity for WooCommerce Products for Woo Sell Services

/**
 * Modify Maximum Quantity for WooCommerce Products
 *
 * This code snippet is used to adjust the maximum quantity input for WooCommerce products.
 * Specifically, it targets products marked as a service or non-tangible item.
 */

// Add a filter to modify the maximum quantity input for WooCommerce products
add_filter( 'woocommerce_quantity_input_max', 'woo_sell_service_test_quantity_input_max', 20, 2 );

/**
 * Function to set the maximum quantity for service-type products
 *
 * @param int $max_value The maximum quantity value.
 * @param WC_Product $product The product object.
 * @return int The modified maximum quantity value.
 */
function woo_sell_service_test_quantity_input_max( $max_value, $product ) {
    // Check if the product is marked as a service or non-tangible item
    if ( 'yes' == get_post_meta( $product->get_id(), '_wss_type', true ) ) {
        // Ensure the product is not sold individually by clearing the '_sold_individually' meta
        update_post_meta( $product->get_id(), '_sold_individually', '' );
    }

    // Return the maximum quantity value (modified or unmodified)
    return $max_value;
}