Are you trying to determine which interfaces are connected/active? That's subtly different from "enabled". Unfortunately the API doesn't make that abundantly clear, but you can look at the mediatype property which will end with "up" or "down" depending on its connection state:
PS C:\> get-nanetinterface | ft Interface, Enabled, Mediatype -AutoSize
Interface Enabled Mediatype
--------- ------- ---------
e0a True auto-1000t-fd-up
e0b False auto-1000t-fd-up
e0c False auto-unknown-down
e0d False auto-unknown-down
e0P True auto-unknown-down
lo True VIA Provider
losk True
vh False