Hello,
Please see screenshot – http://prntscr.com/iq14g1 This relates to WC – https://wordpress.org/support/topic/woocommerce-category-issue-uncategorized/ + https://mikejolley.com/2018/02/07/woocommerce-3-3-hide-uncategorized-category-from-the-shop-page-on-the-frontend/
Regards