This demo uses imperative chart updates. The generated code is a faithful Angular translation: open it in CodeSandbox to run and tweak.

import { Component, AfterViewInit, OnDestroy, ViewChild } from '@angular/core';
import {
  ChartComponent,
  ApexAxisChartSeries,
  ApexNonAxisChartSeries,
  ApexChart,
  ApexXAxis,
  ApexYAxis,
  ApexTitleSubtitle,
  ApexDataLabels,
  ApexStroke,
  ApexFill,
  ApexLegend,
  ApexTooltip,
  ApexMarkers,
  ApexPlotOptions,
  ApexResponsive,
  ApexGrid,
  ApexAnnotations,
  ApexStates,
  ApexTheme,
  NgApexchartsModule,
} from 'ng-apexcharts';

export type ChartOptions = {
  series?: ApexAxisChartSeries | ApexNonAxisChartSeries;
  chart?: ApexChart;
  xaxis?: ApexXAxis;
  yaxis?: ApexYAxis | ApexYAxis[];
  title?: ApexTitleSubtitle;
  subtitle?: ApexTitleSubtitle;
  dataLabels?: ApexDataLabels;
  stroke?: ApexStroke;
  fill?: ApexFill;
  legend?: ApexLegend;
  tooltip?: ApexTooltip;
  markers?: ApexMarkers;
  plotOptions?: ApexPlotOptions;
  responsive?: ApexResponsive[];
  grid?: ApexGrid;
  annotations?: ApexAnnotations;
  states?: ApexStates;
  theme?: ApexTheme;
  colors?: string[];
  labels?: any;
};

@Component({
  selector: 'app-chart',
  standalone: true,
  imports: [NgApexchartsModule],
  templateUrl: './chart.component.html',
})
export class AppChart implements AfterViewInit, OnDestroy {
  @ViewChild('chart') chart!: ChartComponent;
  public chartOptions: Partial<ChartOptions> = {
          series: [
            {
              name: 'High - 2025',
              data: [28, 29, 33, 36, 32, 32, 33],
            },
            {
              name: 'Low - 2025',
              data: [12, 11, 14, 18, 17, 13, 13],
            },
          ],
          chart: {
            height: 350,
            type: 'line',
            dropShadow: {
              enabled: true,
              color: '#000',
              top: 18,
              left: 7,
              blur: 10,
              opacity: 0.2,
            },
            zoom: {
              enabled: false,
            },
            toolbar: {
              show: false,
            },
          },
          colors: ['#77B6EA', '#545454'],
          dataLabels: {
            enabled: true,
          },
          stroke: {
            curve: 'smooth',
          },
          title: {
            text: 'Average High & Low Temperature',
            align: 'left',
          },
          grid: {
            borderColor: '#e7e7e7',
          },
          markers: {
            size: 1,
          },
          xaxis: {
            categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul'],
            title: {
              text: 'Month',
            },
          },
          yaxis: {
            title: {
              text: 'Temperature (°C)',
            },
            min: 5,
            max: 40,
          },
          legend: {
            position: 'top',
            horizontalAlign: 'right',
            floating: true,
            offsetY: -25,
            offsetX: -5,
          },
        };
  ngAfterViewInit() {
    (window as any).ApexCharts.setLicense('APEX-eyJleHBpcnlEYXRlIjoiMjEyNi0wNy0wNCIsImlzc3VlRGF0ZSI6IjIwMjYtMDctMjgiLCJwbGFuIjoicHJlbWl1bSIsImRvbWFpbnMiOlsiYXBleGNoYXJ0cy5jb20iLCIxMjcuMC4wLjEiLCJsb2NhbGhvc3QiXSwic2lnIjoieVBmb1VCc0Z3TU9ZdUEyaEZkR0I2Y1FtZ0JITUtXcVdJSjB2NVRESXRZbFR3eDJMUmh6R2x0RUc3VXJ4X0s3b25ZMWRZb2Z2VGItN01ydFYyNDVyOWcifQ==');
  }

  ngOnDestroy() {
    // no cleanup needed
  }
}
Line with Data Labels - Angular Line Charts | ApexCharts.js | ApexCharts.js