In Airflow 2.0, you can get the status of tasks in a dag by running CLI command: airflow tasks states-for-dag-run. (See docs here: https://airflow.apache.org/docs/apache-airflow/stable/cli-and-env-variables-ref.html#state_repeat1)
What's the equivalent in Airflow 1.10.12? I can't seem to find it in the 1.10.12 docs.
There is no direct equivalent as this is a new CLI command of Airflow 2.0.
In Airflow 1.10.12 you can do (docs):
airflow task_state [-h] [-sd SUBDIR] dag_id task_id execution_date