per https://blogs.vmware.com/management/2022/05/git-repository-integration-in-vrealize-orchestrator.html GIT Repositories should be visible in the Administration section. We don't have vRealize Automation Orchestrators just stand alone Orchestrators is there an Article on how to get GIT integration without vRealize Automation?
Git Repositories are only available after applying an Aria Automation license, either by setting Aria Automation as an authentication provider or adding the Aria Automation license in Orchestrator Control Center.