Airflow Parallel DAG runs

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I have deployed Airflow in Docker with the following containers:

new-airflow-docker-airflow-scheduler-1 new-airflow-docker-airflow-worker-1 new-airflow-docker-airflow-triggerer-1 new-airflow-docker-airflow-webserver-1 new-airflow-docker-postgres-1 new-airflow-docker-redis-1

I have one worker.

My Airflow Configs are the following

worker_concurrency  16
sync_parallelism    0
parallelism 32
max_active_tasks_per_dag    16
dags_are_paused_at_creation true
max_active_runs_per_dag 16`
DAG configs are
schedule_interval='@hourly',
start_date=datetime(2021,1,1,0, 0, 0),
catchup=True

But When I trigger a DAG. Only 1 task is running. I was expecting to run a lot of tasks because start_date is previous date and catchup is true.

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