I have the same issue. The plugin is working in My Account section, but not in Checkout or Cart sections. I am using WP 6.4.3 and WC 8.6.1.
Also other plugins like States, Cities, and Places for WooCommerce, that I used to install to fill the city fields and now it is not working also.
Maybe WP or WC changed something in the new versions that is causing this.
