wp_postmeta database

If you are not comfortable navigating around your table using phpMyAdmin, then start with this plugin and see what it picks up :
https://en-ca.ww.wp.xz.cn/plugins/wp-sweep/

My first guess would be you have unlimited Revisions turned on.

See here to limit the number of Revisions to keep:
https://www.wpbeginner.com/beginners-guide/complete-guide-to-wordpress-post-revisions/#limitrevisions
and some more reading:
https://kinsta.com/knowledgebase/wordpress-revisions/

That said, WooCommerce is a massive beast of a plugin anyway.