I recently set up one of my old Archer C9's as an access point behind my Archer AX6000.  When I am connected to the AX6000 via wifi I can see the C9 on the tether app, and I can see it when I'm connected directly to the C9 via wifi, but it only shows up as a Local Device.  The AX6000 shows up as a cloud device and I can access it from anywhere.  I used to be able to access the C9 as a Cloud Device when it was my primary router but since reconnecting it I am now unable.  When I go to the settings of the C9 both in the tether app and from the web interface TP-LINK Cloud is missing from the menu.