From your 'My Hub' page (please see below)
On the left hand side of your account, you will see the side menu where you can select 'contacts'.
Select a clients profile
Followed by 'Assignments' from the list below the client profile picture and then 'Programs'
You will see any programs that the client has purchased or been assigned and can then click on a program that you wish to view.
Hit the 'Stats' tab from the 3 options at the top of your page
Here the bottom left tile will show missed and completed workouts and nutrition plans by simply switching between the 2