How to show related products by category and by tag on Woocommerce product page?

Question

WordPress

Good afternoon,
in WooCommerce you need to display similar products by a tag that is set when filling out and is not known in advance, that is, I just cannot specify it in the code. Products that will have this tag are in different categories, there can be 15-20 of them in total.
I plan to display pictures with the name of similar products in the product card in tabs, where each tab belongs to its category. I just added tabs to the end of the /wp-content/themes/my-theme/woocommerce/single-product/product-image.php file so that they are under the big photo - I am writing this because it is not a standard place for related products and the built-in Woocommerce [products] shortcode tag="hoodie"] does not work there, although it shows everything in the description below (I tried it for verification).
I found several variants of this code, the task occurs, but none of them worked for me. Here's what I think is the closest option, but most likely outdated:

<?php
$product_tag = get_post_meta($post->ID, 'test1', true);
$args = array('post_type' => 'product', 'product_cat' => 'accessories', 'test1' => $product_tag );
$postslist = get_posts( $args );
foreach ($postslist as $post) : setup_postdata($post); ?>
<ul>
<li><?php the_title(); ?></li>
</ul>
<?php endforeach; ?>

test1 - this is the name of the custom field where the tag was added, accessories - the category for this tab here.
But for me, this code displays a list with the same names of the current product.
I myself have never been a programmer, if someone helps I will be grateful, I can pay for the time.

Answer 1

Kind.
Here
try
Is something changing?
PS accessories removed for now. Can you have the same tag in different categories?