It seem to be not yet documented <Welcome! | Shelly Technical Documentation>
Can you post what components it has? Knowing components list it is possible to try to add support without device at hand.
This driver has autodetection capabilities. It should report all components and spawn compatible child devices. Atm it supports: cover, cloud, em, emdata, eth, humidity, input, script, switch, temperature and wifi components
Shelly Device Handlers for Hubitat - 
Custom Apps and Drivers / Custom Drivers - Hubitat
