Hi,
Thank you for getting back to us.
Please be informed that I have removed your response from the forums as it contains the PII information.
Yes, it is possible to retrieve child publisher's daily data through the Ad Manager API using the parent publisher's session with appropriate delegation settings. If the delegation type with the child publisher is set to Manager account, ensure that the child publisher has granted the necessary permissions to the parent publisher's manager account.
As per the provided error logs, I could see that you are getting "
AuthenticationError.NO_NETWORKS_TO_ACCESS" error which means that you have not enabled your production account for API access. In order to enable API access to your production environment, you can refer to the
Enabling API access documentation for more information.