Ask HN: How do you manage initiation of code reviews on pull requests on time

We tag reviewers on Gitlab when needed, usually if the person is on a different team, but also we have a dedicated channel to post MR links and if they don’t get seen within a couple hours we bump the post a few times. When THAT doesn’t work we ping people privately.

> without having to tag the reviewer

Then do it. Both GitHUb and GitLab have that feature.