The Samsung Galaxy Watch Active 2 was marketed as a device that would be capable of generating electrocardiograms (ECGs) for advanced health-tracking purposes. Now - almost exactly one year after its launch - the OEM has activated this function. However, it still only works for units sold in their own home market.
https://www.notebookcheck.net/South-Korean-Galaxy-Watch-Active-2-units-finally-get-the-firmware-update-that-turns-ECGs-on.484437.0.html