From what I understand, Meshcore doesn't support the IOT/sensor types of use cases that Meshtastic does, right?

It has some functionality of this type (you can see in the overall map a small number of "sensor" nodes), but it's not super well fleshed out or documented ATM.

What I think you can do for sure today is poll a sensor over the mesh, unlike the meshtastic way where you generally automatically broadcast telemetry.