How to read real-time heart rate? does the SDK support Galaxy Fit 3

Currently I want to use flutter to develop a mobile app to read the real-time heart rate data of Galaxy Fit 3. I observed that the Samsung health kit provides heart rate data, but I did not see the relevant data of real-time measurement ( Is there any relevant method to read the real-time measurement data of heart rate? Does this method support Galaxy Fit 3?
Thanks for response.

Welcome to this forum.

As far as I know, this is not possible.