@Joseph-TP 

Thank you.  This is disturbing because it is neccessary that I am able to set up static IP addresses for my cameras and other IOT devices.  I have reached out to my internet service provider concerting this as I did purchase the router from them.  I am waiting to see what they tell me.  But, could I simply install the correct firmware from TP-Link?  What would the ramifications be?

I contacted my ISP and they set me straight.  I have a Deco X50-PoE mesh network also and it seems that the Address Reservation is handled through the Deco App.  That must be why it is greyed out in the router menues.