The BPM Vision doesn't actually work with Withings' Cardio Check-Up—you need an ECG-enabled Withings tracker, like the ScanWatch 2 ($370), to use that feature. It's also bigger than the BPM Connect ...
To measure blood pressure on the Galaxy Watch 7, you need a Galaxy phone and a cuff-based BP monitor. Open Samsung Health Monitor on your phone and go to Blood pressure > Calibrate the watch. After ...