I've followed the WooCommerce instructions for child themes including declaring the child theme:
function theme_woocommerce_support() {
add_theme_support('woocommerce');
}
add_action('after_setup_theme','theme_woocommerce_support');
(https://docs.woocommerce.com/document/template-structure/)
I created a directory in my child theme for WooCommerce template files:
\storefront-child\woocommerce\
And I've added the file I want to edit:
\storefront-child\woocommerce\templates\content-product.php
I added a comment to the file so I could have something to look for to see that it's working. The only way I can get anything to show up is to edit the original plugin files.
I've disabled all plugins other than WooCommerce to test. I've reviewed the WooCommerce status report tab, and the child theme is registered, but the child theme WooCommerce templates are not. I've made sure debug mode is disabled.
Any other ideas?