Have Connect devs reevaluated whether they can send or receive messages on iPhone? I found a couple Apple Developer docs that make it sound possible:
- https://register.apple.com/resources/messages/msp-rest-api/
- https://developer.apple.com/documentation/messages/msmessage
Though, the latter one might just create a message UI that requires the user interacting with their phone. But the former sure seems like a strong possibility.