Sorry, ignorant American here 
. A pet kangaroo would be nice...
More on topic, and echoing sentiments above - as long as the device can be controlled locally, almost anything is possible with Hubitat, whether with a built-in app/driver or a custom one. I'm aware that community integrations exist for Shelly, Hue, and Homekit. Additional integrations exist beyond these, even for the same devices/systems.
Everything is written in groovy, which is an extension of java - so brush up on that if you want to invest in writing your own integrations! Some of the "official documentation" is a bit sparse, but the community will jump in to assist if you have an issue, and I've found that SmartThings Classic docs (as much as we rag on ST) have been helpful to fill in some of the gaps
