Secrets detection not displaying in merge request widget

Summary

Tested on gitlab.com and 13.3.2-ee

The secrets detection status is not displaying in the merge request widget as documented here https://docs.gitlab.com/ee/user/application_security/secret_detection

See project examples.

Expected:

Steps to reproduce

1. Create a project and enable secrets detection.
2. Add an MR with a file containing a secret ie. https://anton:password-to-detect@gitlab.com
3. Observe in the pipeline after it completes that the secret detection job ran, and it detected a problem. Also observe in the merge request page that the widget does not contain the secrets detection

Example Project

Example MR (no secrets detection in the merge request widget): anton/171111-secrets-detection-test!1 (closed)

Corresponding pipeline (shows secret detection): https://gitlab.com/anton/171111-secrets-detection-test/-/pipelines/185062659/security

What is the current bug behavior?

Secrets detection status does not display on the MR widget, as per the docs.

What is the expected correct behavior?

Secrets detection status should display on the MR widget, as per the docs.

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)
(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)
(we will only investigate if the tests are passing)

Possible fixes