I’m a happy Telegram user, and favor it over other messaging apps. Couldn’t find an action to share to that particular app, so went about finding the URL scheme for it, and made it myself.
It’s a real simple one, and i hope it helps other Telegram users.
It opens a contact picker, allowing you to pick the person you’re messaging. The text input field will then be shown, with the draft already there.
You can find it here.