On the products I have 2 extra meta fields where I can write additional info on the admin.
Actually I added 2 fields “Store 1” and “Store 2” and I can add stock quantities available for each store.

So on the Product Page I’d like to display something like:

Store 1: 20

Store 2: 5

It works perfectly with single product.

But when it comes to variable product I have to display the stock quantites for each variation.

My question is how can I update these fields when the user selects a variation?

(It sould be similar to the SKU, as the user selects a variation the SKU changes.)

I created a custom shortcode which works but doesn’t update when I select a variation on the Product Page:

function store_stock_function() {

    global $product;
    $id = $product->get_id();
    $store1 = get_post_meta( $id, 'store1', true );
    $store2 = get_post_meta( $id, 'store2', true );

     return 'Store 1: ' . $store1 . '<br/>' . 'Store 2: ' . $store2;
}

add_shortcode('store_stock', 'all_stock_function');