This is related to How do notifications on deleted posts work? but that question does not actually answer this one... there's a comment requesting information about this on the answer but it received no response.
As an example - I have a user who posts a low quality question. It gets two downvotes. While writing a comment to explain why the question is low quality, the user deletes their own post. Because I'm a moderator, I go ahead and submit the comment, hoping that it will guide them on how to improve the post.
Are they notified of this?
Does who deleted the post matter? For example, if the moderator comments on a post deleted by users with that privilege, will the OP get the message?
As with the related question, is there a time frame for this or is it irrelevant?
If a moderator deletes the post and then another one comments, will the OP see that comment?