Samsung claiming they have rolled out the upgrade for active watch 2 and 3 is bulls**t. No such update on my app in UK. I can only record bp on the phone health app manually.
Have you downloaded the Samsung Health Monitor app which is required in addition to the Samsung Health app to use these features? The app appeared as an update on my phone but I cannot see it in the Galaxy store.
@Ranbhere: I can confirm that the ECG and Blood Pressure Monitors are available in the UK for Galaxy Watch Active 2 and Galaxy Watch 3 users. Please make sure that your phone and watch softwares are both up to date, then download the Samsung Health Monitor app from the Galaxy Store on both your phone and watch. For further details, please check the link below.