Why HR is hidden in menu and no continuous HR monitor

HR monitor is not continuous, I bought the HR monitor 1S version, but it can only monitor manually. And the manual function is hidden on the app. I can do this with the phone camera already, the reason to buy this is for continuous HR monitor....or that is what I thought that I can see all the info with the health app. Please provide update to enable HR monitor for a period of time. I understand it will drain battery but at least allow customer to use it.

NDK1 about Zepp Life (Formerly MiFit), v2.1.5