JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<meta charset="utf-8">

<script src="https://cdn.jsdelivr.net/npm/chart.js@^3"></script>
<script src="https://cdn.jsdelivr.net/npm/moment@^2"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-moment@^1"></script>

<body>
  <div>
    <canvas height="100px" id="myChart"></canvas>
  </div>
</body>

JavaScript

const customTitle = {
    id: 'customTitle',
    beforeLayout: (chart, args, opts) => {
        const {display,font} = opts;
        if (!display) {
            return;
        }
        const {ctx} = chart;
        ctx.font = font || '12px "Helvetica Neue", Helvetica, Arial, sans-serif'
        const {width} = ctx.measureText(opts.text);
        chart.options.layout.padding.left = width * 1.1;
    },
    afterDraw: (chart, args, opts) => {
        const {font,text,color} = opts;
        const {ctx,chartArea: {top,bottom,left,right}} = chart;
        if (opts.display) {
            ctx.fillStyle = color || Chart.defaults.color
            ctx.font = font || '12px "Helvetica Neue", Helvetica, Arial, sans-serif'
            ctx.fillText(text, 3, (top + bottom) / 2)
        }
    }
}

const labels = ['2021-06-07 00:00:00', '2021-06-08 00:00:00', '2021-06-09 00:00:00'];

const data = {
    labels: labels,
    datasets: [{
        label: 'Fixed defects',
        backgroundColor: 'rgb(0, 255, 0)',
        borderColor: 'rgb(0, 255, 0)',
        data: ['4', '10', '23'],
        barThickness: 5
    }, {
        label: 'Open defects',
        backgroundColor: 'rgb(255, 0, 0)',
        borderColor: 'rgb(255, 0, 0)',
        data: ['43', '7', '1'],
        barThickness: 5

    }]
};

const config = {
    type: 'bar',
    data: data,
    options: {
        scales: {
            x: {
                min: '2021-06-07 00:00:00',
                max: '2021-09-10 00:00:00',
                type: 'time',
                time: {
                    unit: 'week'
                },
                stacked: true,
            },
            y: {
            		title: {
                	text: ['Project1', 'Number of defects', 'Project2'],
                  display: true
                },
                stacked: true,
            }
        },
        plugins: {
            customTitle: {
                display: true,
                text: ['Project1', 'Number of defects', 'Project2'],
 ...