Aha. That's right. I had assumed there was a new link that was different from the previous one. But the only difference is that you can no longer find the app via search.

On the official App Store Connect Help you can read under the link https://help.apple.com/app-store-connect/#/dev3cd978dbd still (as of March 13, 2022): Non-Consumable: A product that is purchased once and does not expire or decrease with use. Example: Race track for a game app. Apple can host your non-consumable products for you. I think it's time to point out the planned changes that will come into effect from April 2022. Thank you.

The email only talks about "non-consumable in-app purchase assets", not about "non-consumable in-app purchase content". To be honest, I've never heard of an "in-app purchase asset" so maybe that's something different than what I use in my app. What just makes me wonder is that nowhere in the documentation for the StoreKit API that I use does it mention that there will soon be no more Apple hosted IAP content. See the section "Download Hosted Content from Apple’s Server" on https://developer.apple.com/documentation/storekit/original_api_for_in-app_purchase/unlocking_purchased_content