由于apiResponse是来自API的响应，因此您应该订阅observable并将响应值分配给apiResponse。
根据您当前的代码，我担心的是，当您使用NG 2-Charts指令时，您没有正确地将值传递给这些输入，例如[data]，[options]。

解决方案1：使用NG 2-图表

barChartData应该是ChartData<'bar'>类型，而不是ChartConfiguration<'bar'>。

barChartData!: ChartData<'bar'>;
barChartOptions!: ChartOptions<'bar'>;
barChartPlugins!: any;
barChartLegend = true;

this.barChartOptions = {
  scales: {
    y: {
      beginAtZero: true,
    },
  },
};

of({
  Private: 6,
  data_1: 15,
}) /* Replace this with the observable that you call the API */
  .subscribe((resp) => {
    this.apiResponse = resp;

    this.barChartData = {
      labels: ['Private', 'NASHA', 'NHIS', 'Others'],
      datasets: [
        {
          data: [this.apiResponse?.Private, this.apiResponse?.data_1],
          label: 'hey',
          backgroundColor: ['#E8E2F4'],
        },
      ],
    };
  });

解决方案2：Pure Chart.js

对于纯Chart.js，您可以执行以下操作：

of({
  Private: 6,
  data_1: 15,
}) /* Replace this with the observable that you call the API */
  .subscribe((resp) => {
    this.apiResponse = resp;

    new Chart('canvas2', {
      type: 'bar',
      data: {
        labels: ['Private', 'NASHA', 'NHIS', 'Others'],
        datasets: [
          {
            data: [this.apiResponse?.Private, this.apiResponse?.data_1],
            label: 'hey',
            backgroundColor: ['#E8E2F4'],
          },
        ],
      },
      options: {
        scales: {
          y: {
            beginAtZero: true,
          },
        },
      },
    } as ChartConfiguration<'bar'>);
  });

Demo @ StackBlitz