Blocksy 2 Exclude Out of Stock products from related and upsells

blc-2-exclude-out-of-stock-products-upsell.php

<?php
add_filter( 'woocommerce_output_related_products_args', function ( $args ) {
    $args['status'] = 'publish';
    $args['limit'] = -1;
    $args['stock_status'] = 'instock';

    return $args;
}, 10, 1 );