Unreviewed PRs merged
App inputs to this metric:
GIT/VCS tools
Use cases:
Having unreviewed PRs merged can be an indication of poor code practices.
Unreviewed PRs have higher probability of introducing bugs in production, thus increasing your change failure rate
Unreviewed PRs can also indicate a lack of expertise in the team to review a complex PR
Higher size of PR might lead to longer pick up times, and sometimes even PRs being merged without review
Some more references:
https://www.hatica.io/blog/code-review-practices/
You can find this metric under the following dashboards: