The 3rd-Party Support feature is a part of the Login Guard module. It works with 3rd party platforms such as WooCommerce, BuddyPress, and Easy Digital Downloads.
It provides the following:
- User Registration & Login Bot Protection
- 2-Factor Authentication for users and customers
- Support Woocommerce social logins
The 3rd-Party Support feature is enabled by default on Pro sites.
The full list of the compatible plugins can be found here.