Get A Custom Field From A Custom Taxonomy Of A Custom Post Type [closed]

If you’r using ACF plugin you should look the documentation first, here’s relevant

ACF saves taxonomies terms meta to options table, and they can be accesed using get_field( "{$field_key}", "{$term->taxonomy}_{$term->term_id}" );

So in you’r example it would be:

$image = get_field( 'featured_image', 'product-category_' . $product_category[0]->term_id );