Is there any way to get Content Templates aka Document Blueprints to create "content with child nodes"? It doesn't look from the docs like it's possible, but. Or is there another way to get a "create" button in the content tree to create a node with children? What we're looking for is a way for editors to create a new item with some specific subitems. Or is there a 13 package that does something like this? If nothing else, would hooking into the "on content item created" event and creating the subitems automatically be a good approach?

There is a package that does this, please hold.

Thanks, will check it out!

If the package does do what you want, you could use a Umbraco Notification, just hook into the publishing event and add the child nodes https://docs.umbraco.com/umbraco-cms/reference/notifications

Thanks, that's what I was trying to express with the > "on content item created" event Plan B 🙂 I guess it's

ContentSavingNotification

whichto I'm referring.