Port Forwarding on new Cox Panoramic Modem/Router

For many years, I had enabled port forwarding on a pc I run as a home theatre to allow me to monitor it remotely from another desktop pc and on my mobile devices. 2 weeks ago I "upgraded" to the new panoramic wifi modem/router and had to reenter the port forwarding information but I still can't view it remotely. For two weeks, I've tried everything I can think of to get this to work and I can't see what's wrong. I finally called Cox today and their response was they couldn't help me but for an additional monthly charge I can get CoxCare and then they'd be able to assist me. Why do I have to pay an additional monthly charge to get something to work that before I "upgraded" worked fine? Is there something simple I'm missing, some setting that needs to be checked that wasn't needed before, to simply get port forwarding to work? I can see the ports have been added in the Panoramic WiFi app.