<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=390945) </details> <!--IssueSummary end--> Once https://gitlab.com/gitlab-org/gitlab/-/issues/390941 is done and the GraphQL subscription is present, the MR page can subscribe to it so it gets real-time updates when the subscription is triggered. Ensure that it re-uses the same websocket connection that already exists on the MR page.