If you’ve created a field group but don’t see it on your store, here are a couple of things to check:
Is the field group assigned to any products? Fields won’t appear unless they’re linked to at least one product or collection. In the app, open your field group and make sure you’ve selected where it should show up.
Is the app embed enabled in your theme? For the fields to appear, the app needs to be active in your theme settings. Go to your Shopify admin, click Online Store > Themes > Customize, then open App embeds and make sure Magical Custom Fields is turned on.