Apologizes, you're correct. I vaguely remember reading they were "first" to get FDA approval for some feature, but if that were ever true, it is sorely outdated information. I fell for the hype, it seems.
Unfortunate that I can't delete or edit the post at this point.
That being said, being the only watch with FDA blessing is a pretty effective point to market
https://www.apple.com/healthcare/apple-watch/