In all versions of GitLab CE/EE since version 11.10, an admin of a group can see the SCIM token of that group by visiting a specific endpoint.
https://hackerone.com/reports/565884
https://gitlab.com/gitlab-org/gitlab/-/issues/11640
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39901.json