Work for a company that has to whitelist all artifacts we use and create local copies in artifactory. For these items

composeOptions {
        kotlinCompilerVersion "1.3.70-dev-withExperimentalGoogleExtensions-20200424"
        kotlinCompilerExtensionVersion "0.1.0-dev13"
    }

Where is that resolved from? Is it packaged with Studio?

I think those are resolved from google's maven for compilation Although there's a packaged version of extensions inside studio to make highlighting work