At the moment the product block is forced to full width and the product can’t be easily changed in the editor. It would be nice if we had a block that would allow us to easily change the product and would allow us to add up to 3 products next to each other.
Hopefully, you look into this and are able to create this feature for MailPoet, since I think many users who use your great product with WooCommerce would like to see this happen.