Not sure if its the same thing we’re asking, I wanted to force display a block when a new instance of a model was created. I wrote a plugin to see if I could do a temporary work around. Working on some errors, in another thread, let me know if it does what you need. I’m hoping this because a native option, and raised anothe support request for a new field type.
My feature request might be a duplicate of this one. New field type to embed a block automatically in content editor