No image flip in block themes?

I tried TP image flip free (to evaluate TP and possibly upgrade to PRO later) on a customer’s site that uses a custom block theme and full-site editing.

Like with another free image flip plugin for WooCommerce, there was no effect at all, not even error messages in the browser console. No additional markup, no additional JavaScript. Not on the built-in WooCommerce product page (“product archive” at /shop URL), not on a custom (full-site-edited) page (using a wp:woocommerce/all-products block) either.

Do we need to explicitly enqueue some script in our plugin or add classes or anything else?