The first time you connect to GitLab via SSH, you are asked to verify the authenticity of the GitLab host you are connecting to. I have noticed that the my ECDSA key fingerprint is not same as the host keys stated online. I am not sure why my fingerprints don’t match. Here is a screenshot of the SSH host key fingerprints stated online
Here is a link to the page I am referencing: https://gitlab.com/help/user/gitlab_com/index.md#ssh-host-keys-fingerprints