Apple Health successfully scrapes my medical records from multiple health systems (as well as Labcorp) using OAuth authenticated public API endpoints provided by their Epic EHR instances. I'm somewhat optimistic because of this. The technology implementation was not the problem, the policy stick was lacking. Thwack.
Tangentially, if you have an iPhone, I highly recommend connecting your health systems so that the records are retrieved and stored in your iCloud account, from a data sovereignty perspective.
Slightly off topic, but why is there no ability (as far as I can tell) to lock your Apple health records with a password/pin/faceid? Seems crazy that every other app containing pii (bank, airline, etc) is lockable but my health records are wide open to anyone who picks up my unlocked phone.
Tangentially, if you have an iPhone, I highly recommend connecting your health systems so that the records are retrieved and stored in your iCloud account, from a data sovereignty perspective.
https://en.wikipedia.org/wiki/Fast_Healthcare_Interoperabili...
https://fhir.epic.com/Documentation?docId=fhir
https://support.apple.com/en-us/HT208647