If I understand the issue correctly, most users accomplish this with alternative text expansion tools right now. Espanso is popular across platforms, AutoHotKey is popular on Windows, and Keyboard Maestro and Alfred are celebrated for Mac.
Only via e.g., Dropbox. Create an Obsidian Vault pointing at a folder in your Dropbox account, and then you can create actions like “When a new tweet from @ryanjamurphy is published, save it as a .md file in my Vault’s Twitter folder.”