In addition, I think it's worth mentioning that to reference the metaobject associated with the page using liquid, one can use:{{ metaobject.field_name }}Whilst obvious once understood, for some reason does not appear to be clearly stated anywhere.

If you encounter this issue there is multiple reasons that could be impacting the webhook registration. They are all mentioned in this thread, but here is a list:- Incorrect or missing scope assigned to your app.  e.g. If you want to listen to orders...

The original link is regarded as 'legacy' and now referrs to new documentation https://shopify.dev/docs/api/app-bridge-library/reference/title-bar.  No mention of whether breadcrumbs are limited to one level. I've tried a few things and can only get ...

I have seen at least one Shopify App that uses that JSON block in it's logic (via a ScriptTag) - though it does appear to not rely on it's existance.I arrived on this page with the same question as you as I was hoping to use it for my app.