iOS: Badge Text scaling props have no effect?

[benomatis]

RN Text props like allowFontScaling, or minimumFontScale appear to have no effect on the Badge component.

I had the Text Size in my iPhone 11 (real device) set to 2nd dot on the slider (Settings > Display & Brightness > Text Size) and it made the numbers inside the badge be positioned too low (not in the middle).

I found this SO answer pointing to the iPhone setting that influences this, and the other answer on the same question pointed out how RN Text component has props that control this, but even though the Badge component is supposed to allow Text component props to be used, neither allowFontScaling, or minimumFontScale actually does anything, it doesn't prevent the scaling.

I had to patch RNP v5.1.4 with the following:

let lineHeightScale = fontScale

if (minimumFontScale) {
  lineHeightScale = fontScale < minimumFontScale ? minimumFontScale : fontScale
}

const lineHeight = size / lineHeightScale

//...

return (
  <Animated.Text
    //...
    style={[
      {
        //...
        lineHeight, // replaced `lineHeight: size / fontScale`
        //...
      },
      //...
    ]}
    {...rest}
  >
    {children}
  </Animated.Text>
);

Am I maybe missing something or is this a bug?