https://github.com/apache/airflow/pull/12139 added some new params to the scheduler -- we have "cursory" docs for them in the comments in the config file, but we should have a more details docs in the scheduler.rst page.
airflow/jobs/scheduler_job.py
return self._file_path
    @staticmethod
    def _run_file_processor(
        result_channel: MultiprocessingConnection,
        parent_channel: MultiprocessingConnection,
        file_path: str,
        pickle_dags: bool,
        dag_ids: Optional[List[str]],
        thread_name: str,
        callback_requests: List[CallbackRequest],
    ) -> None: