Hi,
according to this documentation link (https://shopify.dev/docs/apps/build/online-store/theme-app-extensions/configuration#app-embed-blocks),,) an app embed block with “head” target configured should be injected before the tag. However, there are some themes, or even some Shopify apps that optimize the liquid files, that remove that tag, making the app embed blocks not being injected.
Please, could you provide a workaround to inject app embed blocks somewhere just in case the tag is not present? This situation is causing app developers frustration (who are just following the Shopify documentation) as themes are out of our control 
Kind regards.