Leveraging WordPress Comments on Custom Plugin Object page

I would enable comments for that page and save them with a comment meta holding your object’s ID. To be more specific, this is how would I tackle this issue:

  1. Hook into comment_post action and save a comment meta called my_object_id with your custom object ID as a value when posting a comment from the relevant page.
  2. To display only relevant comments, I’d query the comments with meta_key => "my_object_id" and meta_value set to the actual object ID you’re retrieving the comments for.