JMR.codes

A simple plugin with no settings or overhead. This adds “Bulk duplicate” and “Bulk delete” actions to your WooCommerce coupons admin list. Generate up to 500 duplicate coupons in a single batch, copying every WooCommerce field and any meta fields generated by other plugins.
When generating, an “Advanced options” panel lets you set the generated code length (3–96 characters), override the expiry date, and optionally remove email restrictions so the new coupons can be used by anyone.
A “Delete all unused” button next to the list filter removes every coupon that has never been used, after a confirmation dialog showing the count and a short countdown.
Inspired by <a href="https://wordpress.org/plugins/coupon-bulker/" rel="ugc">Coupon Bulker</a>.

JMR.codes Coupon Manager

Adds the ability to bulk duplicate coupons and bulk delete unused coupons.

philsafc

Easy way to disable the use of coupon codes on specific products within WooCommerce without having to update rules on coupons.
Particularly useful if you have a large number of coupons as saves having to go through each coupon code and update the rules to exclude certain items.

Disable Coupons At Product Level

A Wordpress plugin that allows users to disable customers use of coupons on selected products in WooCommerce

JMR.codes Coupon Manager vs Disable Coupons At Product Level