Expand on “connected devices”

How is the “Connected Devices” on a “hub” card determined? My “ Shelly 1 Mini Gen4” has it but not a Zwave switch that controls a smart light.

Is there a way to expand the availability and configurability of this feature?

I doubt there’s a good way to “discover” the relationship, which has the bane of network discovery for years, but if we could manually add it would help with automation and monitoring