Hello Kapil Dev,
The plugins included in our theme are external and we have purchased an Extended License for each of them, as per the guidelines outlined in the Envato Help Center article: https://help.market.envato.com/hc/en-us/articles/213762463-Bundled-Plugins. This is a common practice among all ThemeForest theme authors.
Unfortunately, if you wish to gain access to Revolution slider addons or premium templates, you will need to purchase an individual license. The extended license that we have does not include these features, and the plugin author requires an individual license in order to grant access.
Best Regards,
8Theme’s Team