Hey there,
Samsung Health works a bit differently from other integrations, because Samsung requires you to send an application to get approval for the SDK - however since you are a Terra API customer, you will just need to let us know once you've submitted the application. We'll notify our Samsung partners for accelerated acceptance as we have a privileged partnership with them.
Regarding automatic data delivery for mobile-only sources like Samsung Health:
The SDK needs to be properly initialized. The SDK should be initialized every time your app is opened. This is a necessary prerequisite for other SDK functions to run as expected.
For automatic payloads, once a user is authenticated, you'll start receiving health data events automatically to your Data Destination (e.g. webhook)".