I see that on older Deco models the ability to add a 3G/4G cellular internet backup is available in the Deco app (https://www.tp-link.com/ae/support/faq/3079/) but I do not find this feature on my newer BE16000 WiFi 7 router. Is there a way to add a cellular internet backup with this model? If not, I will add it as a feature request.