JSFiddle - React, Tailwind, and code Playground

HTML

<div style="min-height: 60vh">
    <canvas id="canvas" style="background-color: #fff">
    </canvas>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.4.1/chart.umd.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/exceljs/4.4.0/exceljs.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/2.0.5/FileSaver.min.js"></script>

JavaScript

function TyLyReport() {
    var lineChartData = {
        labels : ["Jan","Feb","Mar"],
        datasets : [
            {
                label: 'Dataset 1',
                borderColor: 'rgba(75, 192, 192, 1)',
                backgroundColor: 'rgba(75, 192, 192, 0.2)',
                data : [1000, 2000, 2500],
                fill: false
            },
            {
                label: 'Dataset 2',
                borderColor: '#FF4848',
                backgroundColor: 'rgba(255, 72, 72, 0.2)',
                data : [1016, 1800, 2900],
                fill: false
            }
        ]
    };

    var ctx = document.getElementById("canvas").getContext("2d");
    new Chart(ctx, {
        type: 'line',
        data: lineChartData,
        options: {
            responsive : true,
            animation: false,
            scales: {
                y: {
                    beginAtZero: true
                }
            }
        },
        plugins:[
            {
                beforeDraw(chart){ // White background in the exported image
                    const {ctx, canvas} = chart;
                    ctx.save();
                    ctx.fillStyle = '#FFF';
                    ctx.fillRect(0, 0, canvas.offsetWidth, canvas.offsetHeight);
                    ctx.restore();
                }
            }
        ]
    });

    // Export chart image to Excel
    exportToExcel();
}

// Function to export chart image to Excel
function exportToExcel() {
    const canvas = document.getElementById("canvas");
    const image = canvas.toDataURL("image/png").split(';base64,')[1];
    // see https://stackoverflow.com/a/63494628/16466946 (not required)

    const workbook = new ExcelJS.Workbook();
    const worksheet = workbook.addWorksheet('Chart Image');
    const imageId = workbook.addImage({
        base64: image,
        extension: 'png',
    });
    worksheet.addImage(imageId,
        {
            tl: { col: 0, row: 0 },
            ext: { width:...