// 수정 전
primaryXAxis: DateTimeAxis(
dateFormat: DateFormat.yMd(),
majorGridLines: MajorGridLines(width: 0),
),
// 수정 후
primaryXAxis: DateTimeCategoryAxis(
isInversed: true,
dateFormat: DateFormat.yMd(),
majorGridLines: MajorGridLines(width: 0),
),
https://www.syncfusion.com/forums/159919/skip-empty-dates