Answers for "react native text font scaling and font bold"

font weight react native

subWarningText: {
    color: '#5460C8',
    fontWeight: Platform.OS === 'android' ? 'normal' : '400',
    fontSize: 14 / fontScale,
    marginLeft: scaleWidth(24),
    marginRight: scaleWidth(10),
    marginBottom: scaleHeight(276),
  },

react native scaling font

<Text
    numberOfLines={1}// add this
    adjustsFontSizeToFit// add this
    style={{textAlign:'center',fontSize:30}}
  >