for anyone who finds this thread later with the same problem.
The submission cleared to Accepted at roughly the 37-hour mark, with no resubmission and no intervention needed. So for future first-timers searching this: the 24–36 hour extended vetting on a first Developer ID submission is real, it does simply clear on its own, and the standard advice holds — do not resubmit while you wait, and check status with xcrun notarytool info.
Quinn — thank you for the reply and the resources link. As a first-time submitter it's genuinely reassuring to have staff eyes on the thread. Subsequent submissions are now completing in minutes, exactly as documented.
Topic:
Code Signing
SubTopic:
Notarization