It has been requested in the past in the Cloud Ideas subforum.
https://community.wd.com/t/bring-back-the-shutdown-button-to-the-my-cloud-dashboard/177758
https://community.wd.com/t/still-no-proper-sleep-function-for-mycloud/178573
What is dumbfounding is that it is a simple 5 second fix in the v2.x firmware CSS coding to unhide the v2.x Shutdown button in the Dashboard yet they have issued multiple firmware updates without fixing such a stupid easy to fix issue.
I don’t have a v2.x My Cloud but I assume they still haven’t fixed this issue with the latest firmware released yesterday.