to remove this tags I found the solution by using HTML node – Extract content option.
the problem now: the value of the message return" undefined"
the facebook node include two inputs (one for binary = image, other for message = text from HTML) why this message returned.
Or You could just use .removeTags() with any expression you have, like {{ $json.TextContectExtracted.removeTags() }} and it will delete all HTML tags without node.
Sure, you have to add a webhook in N8N and from wordpress side add plugin called WP webhook to listen for what ever u need. check it and inform me in case of any question