Governance Model for Multi-Team Power BI Environment (Admin Oversight+Team Ownership)

 I would suggest a hybrid approach: 

• Create three workspaces: Dev, Test, and Prod.
• Set up an Azure DevOps repository with a Dev branch and restricted feature branches; enforce branch policies so writes require a Pull Request.
• Integrate the Dev branch with the Dev workspace; do not bind feature branches to shared Test—promote to Test via the deployment pipeline or a protected release branch.
• Create deployment pipelines and restrict deploy permissions so developers cannot promote to Prod.
• Grant developers Member/Contributor rights in Dev; keep Test and Prod controlled by admins with the highest privileges.
• Developers build in Dev; multiple developers can work in parallel since the Dev workspace is integrated with Git.
• For promotions, developers raise a PR from the feature branch into the Dev (or release) branch; the PR triggers best‑practice scans (e.g., semantic model BPA).
• The validation pipeline flags any violations for remediation.
• Admins review results and approve or reject the PR and subsequent promotion.
• After approval, changes sync to Test (via pipeline promotion or release-branch sync), and the admin team performs testing.
• Use the deployment pipeline to promote from Test to Prod with a manual approval gate.

Use Fabric workspace variables, deployment rules, and APIs to swap environment-specific settings and reduce manual steps.