This device is not itself a zigbee dimmer. It’s a controller, which is going to send commands to a zigbee dimmer.
Technically it’s a zigbee 3.0 “Non-Color Controller.”
It’s most similar to the IKEA Tradfri puck, Which does have an official integration, so you might start by looking at that DTH. But the mechanics are different because the Lutron device has a press which the IKEA does not, so there would definitely be customization required.
@Automated_House , as @BertABCD1234 indicated the “Aurora“ in the zigbee dimmer DTH is referring to a UK company and their “Aurora AOne” dimmer switch. Not the US-based Lutron “Aurora Always Ready Dimmer,” which is, as noted, not actually a dimmer at all as far a zigbee is concerned, but rather a controller. 