Hello,
We're still hard at work getting the new Google Ads API to feature parity with the old AdWords API, but unfortunately we don't have any specific release timeline for this feature. I've just highlighted it in our list of known issues that remain to be ported over, to make sure it's addressed, but unfortunately for now you'll need to continue using the AdWords API for this information.
Regards,
Mike, Google Ads API Team

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