Having a "reviewed" status doesn't mean the code reviews are shared with the candidate. They will keep seeing the "the company needs to review the solution" page until you close the assessment.
To close an assessment:
Open the assessment.
Click on the three-dot menu in the upper-right corner.
Click on the "Set as done" button.
Confirm your action.
That's it! The candidate will receive an email notifying them that you've set the assessment as done, and they can then view your team's code reviews.