An iOS Shortcuts tidbit I figured out yesterday: if you start with a piece of HTML as your input, it will be converted by Shortcuts to its internal “Rich Text” data type by default.
To send that HTML as HTML to another shortcut or an external service (such as a Micropub endpoint) then you need to convert the Rich Text back to HTML using a Documents > Make HTML from Rich Text action. If you don’t do this, your endpoint or whatever that doesn’t natively understand Shortcuts’ Rich Text format will receive the plain text value.
I really need to revisit my IndieWeb iOS Shortcuts article from last year. I’ve added and improved so much about my workflow since then.