Can I change the initial label text style in syncfusion chart? - flutter

Question

In the Syncfusion chart, text style of axis label can be initially changed depending on the pointIndex of any of the label?
The code I use has a separate widget on the data label. But I can't change the names in XValueMapper.
To make it clearer, below is an example of a piece of code I use:
SfCartesianChart(
title: ChartTitle(
text: title,
backgroundColor: titleBackColor,
textStyle: titleStyle,
),
selectionGesture: ActivationMode.singleTap,
selectionType: SelectionType.point,
series: <ChartSeries>[
StackedBar100Series<RankingChartData, String>(
dataLabelSettings: DataLabelSettings(
builder: (
data,
point,
series,
pointIndex,
seriesIndex,
) {
if (chartData[pointIndex].name.contains(name!)) {
return Padding(
padding: EdgeInsets.only(right: 150.0.w),
child: Icon(
Icons.check_box,
color: primary.base,
),
);
} else {
return const SizedBox();
}
},
isVisible: true,
),
dataSource: chartData,
selectionBehavior: _selectionBehavior,
xValueMapper: (RankingChartData exp, _) => exp.name,
yValueMapper: (RankingChartData exp, _) => exp.positive,
color: positiveColor ?? Colors.green,
sortingOrder: sort ? SortingOrder.ascending : null,
sortFieldValueMapper:
sort ? (RankingChartData exp, _) => exp.positive : null,
onPointTap: (d) {
showDialog(
context: (context),
builder: (context) {
return AlertDialog(
title: Text(chartData[d.pointIndex!].name),
content: Text.rich(TextSpan(children: [
const TextSpan(text: "Positive\n"),
TextSpan(
text: chartData[d.pointIndex!].positive.toString(),
style: TextStyle(
color: positiveColor ?? Colors.green,
fontSize: 20.sp,
),
),
])),
);
});
}),
],
primaryXAxis: CategoryAxis(),
),