I´m trying to create a cloud function which main purpose is to detect when a file is uploaded into a folder in SFTP and then copy that file into a bucket in GCP. No error when I deployed the code put when I manually upload the file in SFTP nothings happens

here are the Cloud Function features:

Python 3.9
trigger: cloud storage
event: google.cloud.storage.object.v1.finalized

Main function

 import paramiko
from google.cloud import storage

def main_function(event, context):
    # Configuración de las variables
    sftp_host = '-----------.com'
    sftp_port = 22
    sftp_username = '123456789'
    sftp_password = '1234567891%'
    sftp_directory = '/Import/TEST_DATA'
    file_name = 'FILE1'
    bucket_name = 'bucket_test'

    # Conexión al servidor SFTP
    transport = paramiko.Transport((sftp_host, sftp_port))
    transport.connect(username=sftp_username, password=sftp_password)
    sftp = paramiko.SFTPClient.from_transport(transport)

    # Descarga del archivo desde el servidor SFTP
    remote_file_path = f'{sftp_directory}/{file_name}'
    local_file_path = f'/tmp/{file_name}'
    sftp.get(remote_file_path, local_file_path)

    # Subida del archivo a Google Cloud Storage
    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(file_name)
    blob.upload_from_filename(local_file_path)

    # Cerrar conexión SFTP
    sftp.close()
    transport.close()

    return 'Proceso completado'

requirements

google-cloud-bigquery==2.25.1
pysftp==0.2.9
pandas==1.4.2
fsspec==2022.5.0
gcsfs==2022.5.0
paramiko==2.8.0
google-cloud-storage==1.44.0

I would appreciate any help. Thank you