Thus, it is obvious that this is the expected behavior when pre-issuing a subscription with testing license licenses for the accounts, the Google Play API will not send orderIds, because the actual purchase in real life is not made, so Google Wallet does not create Any order. This means that the application does not receive an order.
official answer from Google Play Developer Support Representative on this:
At this time, test subscriptions are not displayed in your Google Merchant Center Wallet because they are not actually assigned a valid identifier. I apologize for the confusion.
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, not actually assigned valid order IDs,
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