Azure devops extension for Azure policies definition creation and assignment

We are in the plan of the developing a CI/CD pipeline via Azure devops to create custom Azure policies definition and assignment.
For built-in policies definition only Assignment.

Please share with me if you have Azure Devops extension available to achieve this goal.

I have written powershell script to achieve this goal, but customer expecting me to use the extension so that it will be easy for operations and troubleshooting.