Print taxonomy term description onto product page
It depends a lot on how you're showing this page/information, most probably you're using Views lo list these products, so you can add a Relationship from the Product entity to the Taxonomy (from product variation or display, doesn't matter) to show the fields coming from your categories.

If it's in the product page, it might get trickier, I'd use Display Suite to show fields from other entities, Dynamic fields is an option included in DS and alows you to explore more information that is available for display contextually on your current entity view mode.