This extension is intended to improve the security in Magento 2. By the time of release the functionality of this extension is open to a lot of expansion whereas the initial focus was on closing down backend access to a specified whitelist of IP's while redirecting others to a CMS page with information.
If you have any requests to add to the security extension which is not already covered by the Magento 2 core (like 2FA and Captcha), we would be happy to help you out and spend some resources and time to add it to the extension.
Feel free to create a support request to request for features in this security extension.
To use the extension, purchase the free extension and install it with composer as per our installation instructions.