Amazon.com: Fitbit Sense 2 Advanced Health and Fitness Smartwatch with Tools to Manage Stress and Sleep, ECG App, SpO2, 24/7 Heart Rate and GPS, Shadow Grey/Graphite, One Size (S & L Bands
Here are all the smartwatches that can take an ECG
E.C.G Fitness Tracker HRV,HD Color Screen Activity Tracker with Heart Rate Blood Pressure,Waterproof Health Watch,Sleep Monitor Pedometer Step Counter for Men Women Android iOS Activity Trackers - Newegg.com
Apple Watch ECG app: What cardiologists want you to know - CNET
Smartwatches With ECG Tracker To Monitor The Health Of Your Heart - Times of India (July, 2023)