Hi Chunwei,
Thank you for reaching out. The segments.hour is not provided by the geographic_view resource so it could not be segmented by hour.
Thanks and regards,
Xiaoming, Google Ads API Team
Hi Chunwei,
Thank you for reaching out. There is no other workaround to get this data. There is already a feature request to support the segments.hour for the geographic_view resource. Please keep an eye on our blog for the announcements and updates on new releases.
Thanks and regards,
Xiaoming, Google Ads API Team