Can't block embed a block that is a sub-block of a property tag/block

Subblocks of properties or property blocks are not found by block embed and can not be embedded.

I put my notes, e.g. for a book, under property blocks such that later on, search results will display the metadata that is in the property block.

Example: a property block Book, under which there are notes

  • Book
    • [[My Notes]]
      • A block I wish to later embed somewhere else, but can’t. This doesn’t show up in the ‘/block embed’ or (()) function.

I’m not sure if this is a bug or a feature.
Or is what I’m doing a bad practice ?