If your WD controller ist recognized but the disk is seen as “unititialized” this might be interesting for you.
I had the same issue that WD Book Essential was not working anymore.
In my case, the system (Windows) recognized the disk, saying it is “uninitialized” and initializing failed with an error message “Device not ready”.
The disk itself did not spin up, so I assumed the power supply was dead.
Using another power supply did not help.
I took the disk out of the enclosure and connected it to a sata usb adapter.
The disk worked and I saw nothing - this is where I came to this site to find out that it was encrypted.
Then I figured the controller might be OK but cant get enough power to the disk for spinup.
So I connected the disk to a different power source and only the sata connector to the controller board. (I had to remove the power socket with a saw to be able to connect another plug. - If you have a sata extender cable you won’t need to do this).
Now the controller was powered by the original power supply and the disk was powered by a different PC/SATA power supply.
This way I managed to get the disk working as usual and could take a backup without needing to decrypt it.
Hope this helps.