I have followed the theme app extension getting started guide and everything works fine except the app is not appearing in the Apps in the Add Section popup of theme editor. Any suggestions, how to debug?
@JoshHighland I figured it out. The app block was registered for only a specific template( I think it was only product template) that's why it was not appearing in the home page.
You can find out on which template the app block will appear by looking at the template field in the app block section schema.