I have seen in posts, people ask for something and the response is: well we already have that but its still a hidden feature, message us and we will enable it for you.
How can I have all “Hidden Features” enabled on my PepLink?
I’m not sure where you saw that statement but we sometimes hide features for the reason that they’re under testing and simply not ready for public consumption. As such, it’s not a good idea to post a list of “hidden (beta) features”. For most of customers, they’re not “losing” anything. 
Once the features are ready for general consumption, we will eventually reveal them and make them available to the customers.