ECG support has finally arrived for the Samsung Galaxy Watch Active 2 in South Korea. The feature was supposed to be released alongside the wearable but got delayed. International availability will vary on a country-by-country basis, and it will entirely depend on how long it takes for it to pass through the government machinery of a nation.
https://www.notebookcheck.net/Galaxy-Watch-Active-2-inches-closer-to-the-Apple-Watch-Series-5-with-ECG-functionality.466490.0.html