Reading https://www.macstories.net/news/introducing-the-macstories-shortcuts-archive-a-collection-of-150-custom-shortcuts-for-apples-shortcuts-app/ and esp. the following quote, I realy would like to see Drafts expanded to create and append text with Shortcuts:
“Keep It is part of the problem due to its limited adoption of Siri shortcuts in iOS 12 (even after version 1.6 – see footnote above). I like Keep It – it’s the most iOS-like reference manager currently on the market – but I’ve long wished it could create notes and reliably append data to existing notes without having to use x-callback-url. This limitation is common to other note-taking apps that don’t feature any kind of web-based access (see Ulysses, Bear, Agenda, and Drafts). So when I realized that I wanted to save rich text in a note-taking app without actually launching the app itself, I was out of luck.”