Perhaps the truth is that the Apple Watch’s ECG function is more gimmicky and would fail the review process. Apple wouldn’t want the media attention that there ECG isn’t up to scratch hence they did not want to apply for the review process.
Pretty much this
They can’t prove it in a market where we have very tough processes to be certified as a medical consumer grade device, Australia.
If it works, and is a medical device then Apple needs to show this. Clearly they can’t so they won’t even submit it for approval.
You can search for any device on the TGA website to see if it’s been submitted. Source it hasn’t!