First subscriptions stuck in "Waiting for Review" — "In-App Purchases and Subscriptions" section missing on app version page

I'm unable to submit my first auto-renewable subscriptions and I'm stuck in what looks like an App Store Connect backend inconsistency. Hoping someone has hit this and found a workaround.

Setup

• App: existing app, version 1.0.0 already approved and live.
• New version 1.0.1 (build 7) uploaded, currently in "Prepare for Submission".
• Two first-time auto-renewable subscriptions in one subscription group: family_monthly and family_pro_monthly. Both fully configured: pricing, availability in all regions, localizations, and review screenshot.

The problem

• The "In-App Purchases and Subscriptions" section does NOT appear on the app version page. The page goes straight from the Build section to Game Center — the IAP/subscription selection section is missing entirely, so I cannot attach the subscriptions to the version submission (required for a first submission).
• Both subscriptions are stuck in "Waiting for Review" (the group now shows "In Review"), even though they are NOT part of any submission. In App Review > Submissions, my only two submissions ever are 1 item each (1.0.0 completed, and a 1.0.1 that I deleted) — neither ever contained the subscriptions.
• Because I can't attach them, submitting the app alone yields a 1-item submission and gets rejected under Guideline 2.1(b) (reviewer can't locate the in-app purchases). This has happened twice.

What I've already tried (no effect)

• Hard refresh; Chrome and Safari.
• Removing and re-adding the build to the version.
• Deleting the review submission (version returned to "Prepare for Submission").
• The "Cancel" button on the subscription group (does nothing).
• Editing + saving the subscriptions to force a state recompute.

Environment

• Paid Apps Agreement is active. Roles are correct (Account Holder).
• The subscriptions never entered "Ready to Submit" — they appear to have jumped straight to "Waiting for Review", which seems to be why the version page's IAP section never renders (it only offers subscriptions in "Ready to Submit").

Questions

1. Has anyone recovered subscriptions stuck in "Waiting for Review" that aren't attached to any submission — back to "Ready to Submit"?
2. Any known way to force the "In-App Purchases and Subscriptions" section to appear on the version page?

I've also opened a case with Developer Support for this. Any pointers appreciated.