There also in no other consumer product that has received FDA approval either as a ECG or Afib detection. Yes there are health companies that might have products for consumers but none from a consumer products company.

There have been numerous reports of the Apple watch saving peoples lives, and that was before adding the electrical probes for ECG and Afib readings. You could do it with the older watches with the Kardia Band:
[Link: alivecor.com]