I am using Drupal 10 and trying to edit the body of a node. I want to use the node field values in the HTML body, for example [field_name], but this does not appear to work as it only shows that specific text and not the actual value of the node. I also have tried [field:field_name] with no such luck. Is there any way to do this without having to edit any template file? I have the text format set to 'Full HTML'.
It sounds like you need to use tokens. Drupal core has token functionality built in but doesn't include fields.