hallo apply dear why my iphone battry health so fast dropping so please help me i am so sad 😭

I cannot read what your Battery Health figure is as it is too small for these old eyes. But I can tell you that Battery Health is an inexact figure that varies with usage. The typical Apple Battery lasts for about 2 years of normal use. When Battery Health reaches 80%, it is time to make an appointment at the nearest Apple Store for Battery Replacement. Keep in mind that all batteries deplete over time and at various rates of depletion. This link may help...

Batteries - Maximizing Performance - Apple