Does the create update mutation have stylized text options? Like making the text bold, italic, underlined or even making a hyperlink?
One of the apps in the marketplace called Autoboost is able to do this. They send an update when the user’s subscription has ran out of credits with a hyperlink to the app marketplace. Although, I don’t see any mention that it’s possible in the docs.
My experience is that while you can duplicate the resultant HTML of a mention in the body, the part that triggers the mention event isn’t the resultant HTML but in the processes of posting the update from the UI that includes the mention. This makes it not possible to create mentions via API.