Leviton DH6HD not appearing in Hassio Overview

Greetings. I’m still very new to all of this but learning fast. One issue I can’t figure out yet.

I installed three Leviton DH6HD dimmers. They installed fine and are HomeKit compatible. On HomeKit as well as their native app, they show up fine, work fine. I also have existing Lutron switches that show up in both HomeKit and Hassio and work fine.

How do I get them to show up on my Hassio overview page? Do I need to install ZWave libraries or something I see referred to as a “USB Stick” with the install libraries on it? Or do I simply need to make some sort of reference to them in my configuration.yaml file?

I see other people using these switches/dimmers but I can’t find any explanation as to two they got them to show up. Since I integrated HomeKit to Hassio, I can even use Sonoff basics through HomeKit. Just need to figure out how to get the Leviton dimmers to show up and work now. Thanks.