Formidable connected with woocommerce

Yes, you can. It’s not the easiest thing to get all the custom field names that WooCommerce needs, but here’s a topic with more information on getting it all matched up:
https://formidablepro.com/help-desk/woocommerce-item-fields-informational/

Thanks for this info, i just wonder if you have something like a Woocommerce ad-on so it would be easily implemented. Anyway thanks.
By the way, i have tried the _product_image_gallery but it seems that it wasn’t attach on product, featured image is so far so good.

Not yet. There is a developer who has written one, but it’s not yet publicly available. You can contact him if you’d like.
https://formidablepro.com/knowledgebase/developers/?devid=47651