In Sep 2019 Israel’s Biobeat received FDA approval for its medical smartwatch and patch (see here). It has now also received CE Mark approval. The smartwatch measures blood pressure, cardiac output, stroke volume, blood oxygenation and heart rate.

https://www.medgadget.com/2020/03/biobeat-receives-eu-clearance-for-vital-sign-monitoring-with-wristwatch-and-patch.html