The default 'Description' field in Webflow E-Commerce Products is plain text. There are very few instances where plain text would be applicable in a product description. While you can add Custom Fields adding a new secondary description field to cover Rich Text would be unnecessary duplication.
I'd guess that's what the custom fields are for. The plain text description would be required, because you need to be able to bind it to your product page's META description field, and use an abbreviated product description in your category product lists.
Wishlist item with high impact and low effort - a must
Amen. I can't hardly believe this is the case. Been trying to find a workaround with no luck.