When a candidate is in the Application stage and you have not reviewed the candidate, your colleagues' reviews will be hidden from you by default to ensure an unbiased hiring process.
You can skip the application review to see the reviews given by your colleagues by following the steps below:
Via the sidebar on the left, click on a job opening under 'Your jobs' or head to the 'Jobs' page to navigate to the job you want to view candidates from.
Select 'Candidates' in the menu bar at the top.
Click on a candidate to open up their profile.
Select 'Application' under the 'Hiring stages' section at the top of the candidate profile.
Via the right-hand sidebar, click 'Skip' to skip reviewing the candidate.
After skipping the review, you will be able to see all your colleagues' reviews!