custom tab not showing a custom tab on localhost

There is no difference if you use the plugin on localhost or a remote server.
Are you sure that you use the Lite tab in case of Lite version? Lite version does not display other tabs on the front-end, just the lite-tab.
(You can see more about this in the plugin documentation: https://webshoplogic.com/product/woocommerce-custom-tabs-lite-plugin/#tab-faq)