I followed the guide to create a Theme App extension.
I added my extension with npm run generate and started npm run dev.
I can see my embedded App like in the tutorial. However, I cannot see my “App Block”.
I tried solutions from peoples having similar issues.
“Development store preview” is on.
After doing npm run deploy the block appeared. I believed this is not the expected behavior?
After searching a bit, I found clues in the dev command docs.
| --theme-app-extension-port <port> | | The local port to be used to test a [theme app extension](https://shopify.dev/docs/apps/online-store/theme-app-extensions). | SHOPIFY_FLAG_THEME_APP_EXTENSION_PORT |
| - | - | - | - |
| --theme <ID or name> | -t | The ID or name of the theme to be used to test a [theme app extension](https://shopify.dev/docs/apps/online-store/theme-app-extensions).<br><br>If no theme is specified, then the command will use [Dawn](https://github.com/Shopify/dawn), Shopify's example theme, when testing your theme app extension. | SHOPIFY_FLAG_THEME |
But I don’t know how to use it, and if it’s what I need. Thanks