I am also very much interested in this topic. I searched this forum for answers but I could not find much information on integrating end to end system. Please understand that not everyone on this forum is software developer.
For my home automation system I use Home Assistant open source system running on raspberry pi, sensors from different manufacturers, some zigbee some bluetooth some wifi, and there I am able to configure my web dashboard any way I want, with all buttons, graphs etc. I can setup any possible automation I could think of, simply by modifying configuration files and no coding involved.
Now I am working on a project where we have to build commercial security monitoring system based on lorawan sensors and alarm panels with siren and strobe lights. System has to support multiple sites and multiple users with different privileges. Some users will be able to deactivate alarm, some will not, different users will be presented with different live dashboards. In case of alarm, we have to send SMS alert to configured mobile number etc.
With so many big names in IoT game and so many open source systems we are still struggling trying to select end to end out of the box solution, preferably with no software development required.
I would greatly appreciate guidance, based on either commercial or open source system.