Compliance across multiple repositories in the organization

I have hundreds of Gitlab repositories within the organization for which I want to introduce a specific configuration file and track its adoption.

Just for simplicity, let’s say, if file XYZ in the root folder of the repository contains a value ABC then the repository is compliant - I want to know how many (%) and which repositories (list) are not yet compliant.

Is there already a built-in feature that I can use to achieve that? or is there already a well-known pattern/external tool that I could use?