I am having the same issue. Checkout was successfully completed but the order, completedAt and transaction objects are null.
{"data":{"checkoutCompleteWithTokenizedPaymentV3":{"checkout":{"order":null,"createdAt":"2023-07-14T18:23:04Z","completedAt":null,"orderStatusUrl":null,"email...
No errors and order were successfully created. I tried versions 2022-07, 2022-10 and 2023-07.
Any help is truly appreciated.
Thanks!