You may be able to follow Luke Bonaccorsi's article https://lukeb.co.uk/blog/2021/03/15/no-comment-adding-webmentions-to-my-site/ to get Webmentions sending automagically on builds of your site, which would integrate with https://brid.gy to publish a note - I'm using a different Webmention sending process, but Bridgy's what replying to you now :)