Delivery customization extension not working

Retired Boards Appdev Extensions
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Topic summary

Delivery customization extension fails after migrating from a separate app (working in a development store) to an existing app used across multiple stores. The user asks whether a Shopify extension takes effect immediately once attached to an existing app.

Observations: The extension is intended to sort shipping rates returned by the existing app based on a specific field. The extension dashboard’s graph UI shows no logs, indicating the customization may not be executing.

Context: The existing app successfully returns different shipping rates; the new extension should reorder them but currently does not.

Open questions: Whether additional setup, deployment steps, or store-level activation are required for the extension to run within the existing app. Why logs are not appearing in the extension dashboard and how to verify execution.

Status: Troubleshooting; no resolution or action items yet. Guidance requested on activation behavior and steps to diagnose missing logs and non-functioning delivery customization.

Summarized with AI on January 16. AI used: gpt-5.
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Hi everyone,

I have this extension created on a separate app in which I tested this one inside my development store and everything works fine. Now I want to move this extension to an existing app that is already been used for many stores. My question is, does a shopify extension immediately take effect once this will be attached to the existing shopify app? I’m facing problem today in which my delivery customization is not working and can confirm it through the extension dashboard graph UI. I can’t see any logs displayed in the UI. Any tips on how to solve this problem? Thank you

FYI: The existing app returns different shipping rates and the extension that I created will sort this one based on certain field return by the app