On adding the tag #send to Facebook, I used a Make API Call to a simple workflow in Make.com that takes the node I tagged and posts it to my Facebook page. Facebook doesn't let you programmatically post to your personal feed, but if you create a public page, you can post to that and share it on your feed. Also notice that it automatically says "Published by Make".
This workflow can be done in Make.com, n8n, or flowise (or any number of automation platforms)