Hi Wataru,
Thank you for raising your concern.
Could you confirm if you encountered any errors in the API request for the uploading members of the customer match that causing the 0 size? If yes, then please provide the complete
request and
response logs with
request ID generated on your end where we can see the error so that we can check and address it. You can provide it via
Reply privately to author option. If this option is not available, then send it instead on this email address
googleadsa...@google.com.
If there is no error, then it appears that the members are successful uploaded, however, it encountered the bullets below that discussed on this
document:
- It takes 6 to 12 hours for a list to be populated with members, so you'll most likely see an "In Progress" status (on the Google Ads UI) if you upload to an audience list more frequently than once every 12 hours.
- A list may appear to be smaller than expected when viewed in the Audience Manager in the Google Ads UI. This view shows the number of active users in the list. A user is considered active if they have recently logged into their Google account. For more information on active users, see this discussion on how to troubleshoot low traffic with Customer Match lists.
With this, since this is more product specific, then I would suggest to reach out to the product team via this
link as they are more equipped to provide support to this topic.
As for knowing the uploaded members, I would suggest to enable the logging of the API transactions by following one of the guide below as you can see this information there:
Regards,
 |
| Ernie John Blanca Tacata |
| Google Ads API Team |
|
|
| |

ref:_00D1U1174p._5004Q2PIjIv:ref