https://github.com/apache/airflow/pull/27892 added Internal API as part of Webserver.

We need to introduce `airlfow internal-api` CLI command that starts Internal API as a independent component.
"""Initialize Experimental API"""
    if not conf.getboolean("api", "enable_experimental_api", fallback=False):
        return
    from airflow.www.api.experimental import endpoints
    warnings.warn(
        "The experimental REST API is deprecated. Please migrate to the stable REST API. "
        "Please note that the experimental API do not have access control. "
        "The authenticated user has full access.",
        RemovedInAirflow3Warning,
    )
    app.register_blueprint(endpoints.api_experimental, url_prefix="/api/experimental")
    app.extensions["csrf"].exempt(endpoints.api_experimental)