How to access the mapped value of a task-group parameter in a Jinja template?

[bjoernpollex]

I have a use-case where I create a task group that has a parameter over which I am expanding. Now I have an operator inside this task group that needs to access the parameter value in a Jinja template. Below is a simple DAG that demonstrates the use-case:

from airflow import DAG
from airflow.decorators import task, task_group
from airflow.providers.standard.operators.bash import BashOperator
from pendulum import DateTime

with DAG(dag_id="dynamic_mapping_test_v2",
         schedule="@daily",
         start_date=DateTime(2025, 7, 2),
         catchup=True) as dag:

    @task
    def values():
        return 1,2,3,4,5

    @task_group
    def tg(v) -> None:
        BashOperator(
            task_id="print_values",
            bash_command="echo '{{ v }}'"
        )

    tg.expand(v=values())

The bash_command is supposed to echo the mapped value. Can someone tell me how I can achieve that?