The web interface to my Deco Router (in Router mode) is incredibly simplistic and I can't seem to find all the menus that are talked about online. i've included below the full set of screens that I can see.  Even under advanced, most of it is just stuff to look at as opposed to being able to do anything.  

I can't find any access controls, ability to reserve a network address to a device, etc...  There is a bit more in the app but not much.  How do I access the more advanced features, why is the interface so simplistic.