Display custom module block in page content

Question

I have created a custom module providing a block.

The block is available in the block library under "Block Layout" (/admin/structure/block).

On the other hand, I have a custom content type with an "Entity reference revisions" field that allows me to add any kind of content to a page. I can select "Add Drupal Block" in this field but my custom block either:

1. Shows up in the list if it's placed in the block layout (but then it appears twice on the page)
2. Doesn't show at all in the list if it's not placed in the block layout

Am I misunderstanding something or doing something wrong ? Thanks!

Answer 1

You've created a custom block plugin in a custom module and now you need to configure it? Then the question is where to store the configuration when you don't want to use the block layout.

This could be the Layout Builder as commented or a smaller, more targeted module like https://www.drupal.org/project/block_field.

The "Entity reference revisions" field is usually used together with Paragraphs. Then "Add Drupal Block" adds a paragraph type, in which you could use the mentioned field module. This module can be used as a stand-alone node field as well if the only purpose of this field is to place the block.