1009: The URL is not a valid App Clip link — send it as a link message part instead
The app_clip part's URL is not a page that can be sent as an App Clip card.
The app_clip part’s value is not a link that renders as an Apple Pay / App Clip card. Either send the URL as a plain link message part, or use a URL whose page is registered as an App Clip.
Troubleshooting
Section titled “Troubleshooting”- Send the URL as a
linkpart instead of anapp_clippart - Use a URL whose destination page is registered as an App Clip