Not shown in thumbnails?

Hi @kenjiyoshida, I tried on some themes and it was working fine. What is the theme you’re using?

Charlie

I use LION BLOG CHILD.

I can see on /shop/ page on your website that you’re actually using WooCommerce Products block (Gutenberg) to display your products. This plugin is not compatible with WooCommerce product grid block (see https://github.com/CharlieEtienne/sold-out-badge-for-woocommerce/issues/6). So your theme isn’t a problem.

See here to follow WooCommerce advancement on this limitation.

Charlie

Thank you very much! Instead of waiting, is there anything I can do?

Yes, you could use another way to display your products: with woocommerce shortcode for example.

Basic usage is [products].

If you need some customization, see available options here

Charlie