Previously flow looked like this:

from prefect import apply_map, Flow

from mycode import task1, task2, task3, get_org

def extract_from_file(file: dict, organization: str):
    task1_results = task1(file['key'])
    task2_results = task2(file['another_key'])
    task3_results = task3(file['yet_another_key'], organization)
    

with Flow('this-flow', ) as this_flow:
    files = Parameter('files')
    organization = get_org()
    flow_file = apply_map(
        extract_from_file,
        file=files,
        organization=unmapped(organization),
    )

I don’t think there’s a direct equivalent yet, since it most cases it’ll be more readable to just loop

Will this be run in parallel?

(Concurrently in threads, technically)

If you want parallelism with multiprocessing you need to use a Dask task runner.