Having same issue.
You guys found any solution?
Topic summary
Problem: After creating a theme app extension for Dawn (OS 2.0), the “Add block” panel shows “No App blocks found” despite successful setup in a development store.
What was tried: New dev stores, updating Shopify CLI, recreating the app, and a minimal block schema targeting product/index. No errors on push/enable. Some considered reverting to Online Store 1.0 or speculated about needing a full installable app or Ruby version mismatch.
Working fixes reported:
- Use the CLI scaffold with: shopify extension create --getting-started. This made the app block appear.
- Ensure the block schema’s “templates” includes the page type (e.g., “product”, “index”); blocks only show on those templates.
- In Partners > Apps > Extensions > Development store preview, enable and set visibility for the extension.
- Run npm run deploy (not just npm run dev). Deployment is required for initial load and each update during development.
Additional note: One user observed the issue on Shopify Plus Sandbox stores but not on standard Development Stores.
Status: Partially resolved with the above steps; environment-specific issues (e.g., Plus Sandbox) may persist. A screenshot was shared but is not essential to the solution.