Heart Rate Variability (HRV)

Greetings kakaridwaan,

Thanks for visiting the Apple Support Communities! I understand you're not seeing Heart Rate Variability (HRV) measurements in the Health app as expected.

HRV measurements aren't available in China mainland, Malaysia, South Africa, and Turkey, as outlined in the following support article: Your heart rate. What it means, and where on Apple Watch you’ll find it. - Apple Support

Keep in mind, turning on Low Power Mode saves battery life by disabling Heart Rate measurements during Run and Walk workouts, as mentioned in the following guide: Work out with your Apple Watch - Apple Support

If you're in a location where HRV is available, and the issue isn't related to Low Power Mode, then I suggest confirming your Apple Watch is fitted correctly. You can see those steps, and further steps to ensure your metrics are calculated accurately, from the following guide: Get the most accurate measurements using your Apple Watch - Apple Support

Let me know how it goes from here.

Kind regards.