Go to "Reviews" section. Make sure you're on a relevant skillboard.
Open "All reviews" tab.
Choose active review.
Here you'll see the progress of a review.
How many members completed self-review
How many members completed reviews of their colleagues
You can see the completed reviews in the "Reports" tab.
Click on the arrow icon to see review status of an employee. You'll see a list of people who haven't completed review of this member yet. There will also be the number of skills assessed and the status.
You can see who completed review on the "Progress" tab. Press the arrow icon to see members assessed by the reviewer. There will also be info on the number of skills assessed and the status.