I have WSUS 3.2.7600.226.

Is there a way to schedule the approval of updates for a specific group?

For example, I want certain updates approved at 10:30pm on a certain date for a specific computer group.

Please let me know if this is possible and thanks for the help.

serverfault.com/questions/463573/wsus-report-approvals-for-a-group

Refer This Link 

Not built-in to my knowledge.
ConfigMgr can do very advanced scheduling, but I don't think WSUS offers that at all.
You could probably find some 3rd party extension or integration might offer that, or, write something yourself with the SDK or scri