Device Extension Attributes in Azure

I am trying to build a dynamic group in azure to pull in the extension attributes for device.

I found the article below and upon inspection I am only seeing the (User) and (Group) option, where what category would "Devices" fall into? Currently on a hybrid domain system. Which one of these would grab the device extension attribute from the device on our onprem domain controller?

https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/how-to-connect-sync-feature-directory-extensions