So it's kind of like a VLAN except it's strapped onto the 5G network of the various providers of 5G service via hotspots. Kind of like my 4G security system piggybacks on the network but isn't really callable by a regular old cell phone.
No it's not. It's more like a wifi access point, a hardware device that sets up a private network. The public providers aren't involved in your 5G network at all (unless you are using them for internet uplink at the facility, but that is independent of the private network. AWS handles all the complicated 5G software stack in the cloud though.