@gewithers It's now April 2020 and I have the same problem. Seems Tp-Link hasn't fixed it yet. Makes it impossible to add port forwarding or static IP to these devices since the mobile app requires...

A device is connected to the Deco M9 Plus but does not show up in the list of connected devices displayed in the drop-down list for setting up Port Forwarding. This makes it impossible to do any port...

@kamenev197 I have the same requirement and was told that there is no way to add an IP address to the Deco M9 Plus. You must select from the drop-down list, and my device doesn't appear in the list....

Is there a way to create an address reservation for a device that has not yet joined the network? I have the MAC address of the device and know what IP I need to reserve but the Deco mobile app only...