That Fitbit integration is slowly making its way to Wear OS. A cosmetic change coming to the smartwatch platform brings Bitmoji watch faces. This is a familiar feature for Fitbit users, but now you can send your Bitmoji avatar to supported apps.
If you're interested in making one, you can do that on Snapchat, Bitmoji.com, or the Bitomoji mobile app. You need to install the Bitmoji watch face on your Wear OS device. It hasn't rolled out, but Google teases that it's coming soon.